diff --git a/.github/workflows/sdk_generation.yaml b/.github/workflows/sdk_generation.yaml
index 9a9c314..eff06ab 100644
--- a/.github/workflows/sdk_generation.yaml
+++ b/.github/workflows/sdk_generation.yaml
@@ -59,6 +59,16 @@ jobs:
         with:
           php-version: "8.3"
 
+      - name: Setup yq
+        # scripts/generate.sh rewrites the spec with yq (mikefarah v4) before
+        # generation. Pin and verify the binary instead of relying on whatever
+        # the runner image ships; fail closed on checksum mismatch.
+        run: |
+          curl -fsSL -o /tmp/yq \
+            https://github.com/mikefarah/yq/releases/download/v4.44.3/yq_linux_amd64
+          echo "a2c097180dd884a8d50c956ee16a9cec070f30a7947cf4ebf87d5f36213e9ed7  /tmp/yq" | sha256sum -c -
+          sudo install -m 0755 /tmp/yq /usr/local/bin/yq
+
       - name: Regenerate client
         run: ./scripts/generate.sh
 
diff --git a/README.md b/README.md
index 94c0899..fac0f05 100644
--- a/README.md
+++ b/README.md
@@ -30,8 +30,7 @@ use Convoy\Client\Model\ModelsCreateEvent;
 
 $config = (new Configuration())
     ->setHost('https://us.getconvoy.cloud/api')
-    ->setApiKeyPrefix('Authorization', 'Bearer')
-    ->setApiKey('Authorization', $apiKey);
+    ->setAccessToken($apiKey); // the client adds the Bearer prefix
 
 // Pin the API version this client was generated from.
 $http = new \GuzzleHttp\Client([
diff --git a/scripts/generate.sh b/scripts/generate.sh
index a471e1e..1165bdc 100755
--- a/scripts/generate.sh
+++ b/scripts/generate.sh
@@ -5,7 +5,7 @@ set -euo pipefail
 # (php), then sync it into src/Client/ without touching the hand-written SDK
 # code (the rest of src/, incl. webhook verify).
 #
-# Requires: java 17+, rsync, curl. Run from the repo root.
+# Requires: java 17+, rsync, curl, yq (mikefarah v4). Run from the repo root.
 
 SPEC_URL="${SPEC_URL:-https://raw.githubusercontent.com/frain-dev/convoy/main/docs/v3/openapi3.yaml}"
 # Pin so regeneration output is reproducible; bump deliberately.
@@ -33,6 +33,23 @@ echo "${GENERATOR_SHA256}  ${GENERATOR_JAR}" | shasum -a 256 -c - >/dev/null ||
 
 curl -fsSL "$SPEC_URL" -o "$tmp/openapi3.yaml"
 
+# The spec marks portal link endpoints_metadata items nullable via
+# {allOf: [{$ref: ...}], nullable: true} so strict clients tolerate [null]
+# elements from the server. OpenAPI Generator's php generator mangles that
+# wrapper into a namespace-less class reference (\ConvoyClientModel...), which
+# breaks ObjectSerializer at runtime
+# (https://github.com/OpenAPITools/openapi-generator/issues/23141). Unwrap the
+# single-$ref nullable items back to a plain $ref before generation: the PHP
+# runtime already tolerates null array elements (ObjectSerializer::deserialize
+# returns null before instantiating the class), so nothing is lost. No-op when
+# the spec stops using the wrapper shape.
+yq -i '
+  (.components.schemas[] | select(has("properties")) | .properties[]
+   | select(has("items")) | .items
+   | select(has("allOf") and .nullable == true and (.allOf | length) == 1 and (.allOf[0] | has("$ref")))
+  ) |= .allOf[0]
+' "$tmp/openapi3.yaml"
+
 java -jar "$GENERATOR_JAR" generate \
   -i "$tmp/openapi3.yaml" \
   -g php \
diff --git a/src/Client/Api/DeliveryAttemptsApi.php b/src/Client/Api/DeliveryAttemptsApi.php
index b4d749a..e5f8ada 100644
--- a/src/Client/Api/DeliveryAttemptsApi.php
+++ b/src/Client/Api/DeliveryAttemptsApi.php
@@ -457,10 +457,9 @@ public function getDeliveryAttemptRequest($project_id, $event_delivery_id, $deli
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -792,10 +791,9 @@ public function getDeliveryAttemptsRequest($project_id, $event_delivery_id, stri
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/EndpointsApi.php b/src/Client/Api/EndpointsApi.php
index 96ccb18..c80d17f 100644
--- a/src/Client/Api/EndpointsApi.php
+++ b/src/Client/Api/EndpointsApi.php
@@ -458,10 +458,9 @@ public function activateEndpointRequest($project_id, $endpoint_id, string $conte
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -792,10 +791,9 @@ public function createEndpointRequest($project_id, $models_create_endpoint, stri
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1127,10 +1125,9 @@ public function deleteEndpointRequest($project_id, $endpoint_id, string $content
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1481,10 +1478,9 @@ public function expireSecretRequest($project_id, $endpoint_id, $models_expire_se
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1816,10 +1812,9 @@ public function getEndpointRequest($project_id, $endpoint_id, string $contentTyp
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2236,10 +2231,9 @@ public function getEndpointsRequest($project_id, $direction = null, $next_page_c
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2571,10 +2565,9 @@ public function pauseEndpointRequest($project_id, $endpoint_id, string $contentT
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2905,10 +2898,9 @@ public function testOAuth2ConnectionRequest($project_id, $models_test_o_auth2_re
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -3259,10 +3251,9 @@ public function updateEndpointRequest($project_id, $endpoint_id, $models_update_
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/EventDeliveriesApi.php b/src/Client/Api/EventDeliveriesApi.php
index c05398e..214eb2f 100644
--- a/src/Client/Api/EventDeliveriesApi.php
+++ b/src/Client/Api/EventDeliveriesApi.php
@@ -621,10 +621,9 @@ public function batchRetryEventDeliveryRequest($project_id, $direction = null, $
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -955,10 +954,9 @@ public function forceResendEventDeliveriesRequest($project_id, $models_ids, stri
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1465,10 +1463,9 @@ public function getEventDeliveriesPagedRequest($project_id, $direction = null, $
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1800,10 +1797,9 @@ public function getEventDeliveryRequest($project_id, $event_delivery_id, string
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2135,10 +2131,9 @@ public function resendEventDeliveryRequest($project_id, $event_delivery_id, stri
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/EventTypesApi.php b/src/Client/Api/EventTypesApi.php
index 2e94a5c..3a3c72a 100644
--- a/src/Client/Api/EventTypesApi.php
+++ b/src/Client/Api/EventTypesApi.php
@@ -445,10 +445,9 @@ public function createEventTypeRequest($project_id, $models_create_event_type, s
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -780,10 +779,9 @@ public function deprecateEventTypeRequest($project_id, $event_type_id, string $c
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1095,10 +1093,9 @@ public function getEventTypesRequest($project_id, string $contentType = self::co
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1429,10 +1426,9 @@ public function importOpenApiSpecRequest($project_id, $models_import_open_api_sp
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1783,10 +1779,9 @@ public function updateEventTypeRequest($project_id, $event_type_id, $models_upda
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/EventsApi.php b/src/Client/Api/EventsApi.php
index b775d21..dd6430a 100644
--- a/src/Client/Api/EventsApi.php
+++ b/src/Client/Api/EventsApi.php
@@ -603,10 +603,9 @@ public function batchReplayEventsRequest($project_id, $direction = null, $end_da
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1083,10 +1082,9 @@ public function countAffectedEventsRequest($project_id, $direction = null, $end_
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1417,10 +1415,9 @@ public function createBroadcastEventRequest($project_id, $models_broadcast_event
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1751,10 +1748,9 @@ public function createDynamicEventRequest($project_id, $models_dynamic_event, st
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2085,10 +2081,9 @@ public function createEndpointEventRequest($project_id, $models_create_event, st
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2419,10 +2414,9 @@ public function createEndpointFanoutEventRequest($project_id, $models_fanout_eve
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2754,10 +2748,9 @@ public function getEndpointEventRequest($project_id, $event_id, string $contentT
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -3234,10 +3227,9 @@ public function getEventsPagedRequest($project_id, $direction = null, $end_date
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -3569,10 +3561,9 @@ public function replayEndpointEventRequest($project_id, $event_id, string $conte
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/FiltersApi.php b/src/Client/Api/FiltersApi.php
index 4f0eedc..f1df347 100644
--- a/src/Client/Api/FiltersApi.php
+++ b/src/Client/Api/FiltersApi.php
@@ -474,10 +474,9 @@ public function bulkCreateFiltersRequest($project_id, $subscription_id, $models_
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -828,10 +827,9 @@ public function bulkUpdateFiltersRequest($project_id, $subscription_id, $models_
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1182,10 +1180,9 @@ public function createFilterRequest($project_id, $subscription_id, $models_creat
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1537,10 +1534,9 @@ public function deleteFilterRequest($project_id, $subscription_id, $filter_id, s
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1892,10 +1888,9 @@ public function getFilterRequest($project_id, $subscription_id, $filter_id, stri
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2227,10 +2222,9 @@ public function getFiltersRequest($project_id, $subscription_id, string $content
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2601,10 +2595,9 @@ public function testFilterRequest($project_id, $subscription_id, $event_type, $m
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2975,10 +2968,9 @@ public function updateFilterRequest($project_id, $subscription_id, $filter_id, $
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/MetaEventsApi.php b/src/Client/Api/MetaEventsApi.php
index 15442e3..2bc94c0 100644
--- a/src/Client/Api/MetaEventsApi.php
+++ b/src/Client/Api/MetaEventsApi.php
@@ -440,10 +440,9 @@ public function getMetaEventRequest($project_id, $meta_event_id, string $content
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -860,10 +859,9 @@ public function getMetaEventsPagedRequest($project_id, $direction = null, $end_d
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1195,10 +1193,9 @@ public function resendMetaEventRequest($project_id, $meta_event_id, string $cont
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/OnboardApi.php b/src/Client/Api/OnboardApi.php
index c4dd982..0deb5c2 100644
--- a/src/Client/Api/OnboardApi.php
+++ b/src/Client/Api/OnboardApi.php
@@ -76,7 +76,7 @@ class OnboardApi
     /** @var string[] $contentTypes **/
     public const contentTypes = [
         'bulkOnboard' => [
-            'application/octet-stream',
+            'application/json',
         ],
     ];
 
@@ -133,16 +133,16 @@ public function getConfig()
      *
      * @param  string $project_id Project ID (required)
      * @param  bool|null $dry_run Validate without creating (optional)
-     * @param  \SplFileObject|null $body Onboard Details (JSON) (optional)
+     * @param  \Convoy\Client\Model\ModelsBulkOnboardRequest|null $models_bulk_onboard_request Onboard Details (JSON) (optional)
      * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['bulkOnboard'] to see the possible values for this operation
      *
      * @throws \Convoy\Client\ApiException on non-2xx response or if the response body is not in the expected format
      * @throws \InvalidArgumentException
      * @return \Convoy\Client\Model\BulkOnboard200Response|\Convoy\Client\Model\BulkOnboard202Response|\Convoy\Client\Model\GetProjects400Response|\Convoy\Client\Model\GetProjects400Response|\Convoy\Client\Model\GetProjects400Response
      */
-    public function bulkOnboard($project_id, $dry_run = null, $body = null, string $contentType = self::contentTypes['bulkOnboard'][0])
+    public function bulkOnboard($project_id, $dry_run = null, $models_bulk_onboard_request = null, string $contentType = self::contentTypes['bulkOnboard'][0])
     {
-        list($response) = $this->bulkOnboardWithHttpInfo($project_id, $dry_run, $body, $contentType);
+        list($response) = $this->bulkOnboardWithHttpInfo($project_id, $dry_run, $models_bulk_onboard_request, $contentType);
         return $response;
     }
 
@@ -153,16 +153,16 @@ public function bulkOnboard($project_id, $dry_run = null, $body = null, string $
      *
      * @param  string $project_id Project ID (required)
      * @param  bool|null $dry_run Validate without creating (optional)
-     * @param  \SplFileObject|null $body Onboard Details (JSON) (optional)
+     * @param  \Convoy\Client\Model\ModelsBulkOnboardRequest|null $models_bulk_onboard_request Onboard Details (JSON) (optional)
      * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['bulkOnboard'] to see the possible values for this operation
      *
      * @throws \Convoy\Client\ApiException on non-2xx response or if the response body is not in the expected format
      * @throws \InvalidArgumentException
      * @return array of \Convoy\Client\Model\BulkOnboard200Response|\Convoy\Client\Model\BulkOnboard202Response|\Convoy\Client\Model\GetProjects400Response|\Convoy\Client\Model\GetProjects400Response|\Convoy\Client\Model\GetProjects400Response, HTTP status code, HTTP response headers (array of strings)
      */
-    public function bulkOnboardWithHttpInfo($project_id, $dry_run = null, $body = null, string $contentType = self::contentTypes['bulkOnboard'][0])
+    public function bulkOnboardWithHttpInfo($project_id, $dry_run = null, $models_bulk_onboard_request = null, string $contentType = self::contentTypes['bulkOnboard'][0])
     {
-        $request = $this->bulkOnboardRequest($project_id, $dry_run, $body, $contentType);
+        $request = $this->bulkOnboardRequest($project_id, $dry_run, $models_bulk_onboard_request, $contentType);
 
         try {
             $options = $this->createHttpClientOption();
@@ -296,15 +296,15 @@ public function bulkOnboardWithHttpInfo($project_id, $dry_run = null, $body = nu
      *
      * @param  string $project_id Project ID (required)
      * @param  bool|null $dry_run Validate without creating (optional)
-     * @param  \SplFileObject|null $body Onboard Details (JSON) (optional)
+     * @param  \Convoy\Client\Model\ModelsBulkOnboardRequest|null $models_bulk_onboard_request Onboard Details (JSON) (optional)
      * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['bulkOnboard'] to see the possible values for this operation
      *
      * @throws \InvalidArgumentException
      * @return \GuzzleHttp\Promise\PromiseInterface
      */
-    public function bulkOnboardAsync($project_id, $dry_run = null, $body = null, string $contentType = self::contentTypes['bulkOnboard'][0])
+    public function bulkOnboardAsync($project_id, $dry_run = null, $models_bulk_onboard_request = null, string $contentType = self::contentTypes['bulkOnboard'][0])
     {
-        return $this->bulkOnboardAsyncWithHttpInfo($project_id, $dry_run, $body, $contentType)
+        return $this->bulkOnboardAsyncWithHttpInfo($project_id, $dry_run, $models_bulk_onboard_request, $contentType)
             ->then(
                 function ($response) {
                     return $response[0];
@@ -319,16 +319,16 @@ function ($response) {
      *
      * @param  string $project_id Project ID (required)
      * @param  bool|null $dry_run Validate without creating (optional)
-     * @param  \SplFileObject|null $body Onboard Details (JSON) (optional)
+     * @param  \Convoy\Client\Model\ModelsBulkOnboardRequest|null $models_bulk_onboard_request Onboard Details (JSON) (optional)
      * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['bulkOnboard'] to see the possible values for this operation
      *
      * @throws \InvalidArgumentException
      * @return \GuzzleHttp\Promise\PromiseInterface
      */
-    public function bulkOnboardAsyncWithHttpInfo($project_id, $dry_run = null, $body = null, string $contentType = self::contentTypes['bulkOnboard'][0])
+    public function bulkOnboardAsyncWithHttpInfo($project_id, $dry_run = null, $models_bulk_onboard_request = null, string $contentType = self::contentTypes['bulkOnboard'][0])
     {
         $returnType = '\Convoy\Client\Model\BulkOnboard200Response';
-        $request = $this->bulkOnboardRequest($project_id, $dry_run, $body, $contentType);
+        $request = $this->bulkOnboardRequest($project_id, $dry_run, $models_bulk_onboard_request, $contentType);
 
         return $this->client
             ->sendAsync($request, $this->createHttpClientOption())
@@ -371,13 +371,13 @@ function ($exception) {
      *
      * @param  string $project_id Project ID (required)
      * @param  bool|null $dry_run Validate without creating (optional)
-     * @param  \SplFileObject|null $body Onboard Details (JSON) (optional)
+     * @param  \Convoy\Client\Model\ModelsBulkOnboardRequest|null $models_bulk_onboard_request Onboard Details (JSON) (optional)
      * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['bulkOnboard'] to see the possible values for this operation
      *
      * @throws \InvalidArgumentException
      * @return \GuzzleHttp\Psr7\Request
      */
-    public function bulkOnboardRequest($project_id, $dry_run = null, $body = null, string $contentType = self::contentTypes['bulkOnboard'][0])
+    public function bulkOnboardRequest($project_id, $dry_run = null, $models_bulk_onboard_request = null, string $contentType = self::contentTypes['bulkOnboard'][0])
     {
 
         // verify the required parameter 'project_id' is set
@@ -425,12 +425,12 @@ public function bulkOnboardRequest($project_id, $dry_run = null, $body = null, s
         );
 
         // for model (json/xml)
-        if (isset($body)) {
+        if (isset($models_bulk_onboard_request)) {
             if (stripos($headers['Content-Type'], 'application/json') !== false) {
                 # if Content-Type contains "application/json", json_encode the body
-                $httpBody = \GuzzleHttp\Utils::jsonEncode(ObjectSerializer::sanitizeForSerialization($body));
+                $httpBody = \GuzzleHttp\Utils::jsonEncode(ObjectSerializer::sanitizeForSerialization($models_bulk_onboard_request));
             } else {
-                $httpBody = $body;
+                $httpBody = $models_bulk_onboard_request;
             }
         } elseif (count($formParams) > 0) {
             if ($multipart) {
@@ -456,10 +456,9 @@ public function bulkOnboardRequest($project_id, $dry_run = null, $body = null, s
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/PortalLinksApi.php b/src/Client/Api/PortalLinksApi.php
index 4c37d02..816fe9b 100644
--- a/src/Client/Api/PortalLinksApi.php
+++ b/src/Client/Api/PortalLinksApi.php
@@ -448,10 +448,9 @@ public function createPortalLinkRequest($project_id, $datastore_create_portal_li
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -783,10 +782,9 @@ public function getPortalLinkRequest($project_id, $portal_link_id, string $conte
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1203,10 +1201,9 @@ public function loadPortalLinksPagedRequest($project_id, $direction = null, $nex
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1538,10 +1535,9 @@ public function refreshPortalLinkAuthTokenRequest($project_id, $portal_link_id,
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1873,10 +1869,9 @@ public function revokePortalLinkRequest($project_id, $portal_link_id, string $co
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2227,10 +2222,9 @@ public function updatePortalLinkRequest($project_id, $portal_link_id, $datastore
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/ProjectsApi.php b/src/Client/Api/ProjectsApi.php
index 981525d..a0a51f8 100644
--- a/src/Client/Api/ProjectsApi.php
+++ b/src/Client/Api/ProjectsApi.php
@@ -474,10 +474,9 @@ public function createProjectRequest($org_id, $models_create_project, string $co
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -803,10 +802,9 @@ public function deleteProjectRequest($project_id, string $contentType = self::co
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1118,10 +1116,9 @@ public function getProjectRequest($project_id, string $contentType = self::conte
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1434,10 +1431,9 @@ public function getProjectsRequest($org_id, string $contentType = self::contentT
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1782,10 +1778,9 @@ public function updateProjectRequest($project_id, $models_update_project, string
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/SourcesApi.php b/src/Client/Api/SourcesApi.php
index c5d23d9..7f50f66 100644
--- a/src/Client/Api/SourcesApi.php
+++ b/src/Client/Api/SourcesApi.php
@@ -445,10 +445,9 @@ public function createSourceRequest($project_id, $models_create_source, string $
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -780,10 +779,9 @@ public function deleteSourceRequest($project_id, $source_id, string $contentType
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1115,10 +1113,9 @@ public function getSourceRequest($project_id, $source_id, string $contentType =
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1535,10 +1532,9 @@ public function loadSourcesPagedRequest($project_id, $direction = null, $next_pa
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1889,10 +1885,9 @@ public function updateSourceRequest($project_id, $source_id, $models_update_sour
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Api/SubscriptionsApi.php b/src/Client/Api/SubscriptionsApi.php
index 81337ee..1d7fa00 100644
--- a/src/Client/Api/SubscriptionsApi.php
+++ b/src/Client/Api/SubscriptionsApi.php
@@ -457,10 +457,9 @@ public function createSubscriptionRequest($project_id, $models_create_subscripti
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -792,10 +791,9 @@ public function deleteSubscriptionRequest($project_id, $subscription_id, string
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1127,10 +1125,9 @@ public function getSubscriptionRequest($project_id, $subscription_id, string $co
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1547,10 +1544,9 @@ public function getSubscriptionsRequest($project_id, $direction = null, $endpoin
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -1881,10 +1877,9 @@ public function testSubscriptionFilterRequest($project_id, $models_test_filter,
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2215,10 +2210,9 @@ public function testSubscriptionFunctionRequest($project_id, $models_function_re
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2550,10 +2544,9 @@ public function toggleSubscriptionStatusRequest($project_id, $subscription_id, s
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -2904,10 +2897,9 @@ public function updateSubscriptionRequest($project_id, $subscription_id, $models
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
@@ -3238,10 +3230,9 @@ public function v1ProjectsProjectIDSourcesTestFunctionPostRequest($project_id, $
             }
         }
 
-        // this endpoint requires API key authentication
-        $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
-        if ($apiKey !== null) {
-            $headers['Authorization'] = $apiKey;
+        // this endpoint requires Bearer authentication (access token)
+        if (!empty($this->config->getAccessToken())) {
+            $headers['Authorization'] = 'Bearer ' . $this->config->getAccessToken();
         }
 
         $defaultHeaders = [];
diff --git a/src/Client/Model/AuthRoleType.php b/src/Client/Model/AuthRoleType.php
index 7b57e10..b96f392 100644
--- a/src/Client/Model/AuthRoleType.php
+++ b/src/Client/Model/AuthRoleType.php
@@ -73,6 +73,8 @@ class AuthRoleType
      */
     public const ROLE_API = 'api';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -85,7 +87,8 @@ public static function getAllowableEnumValues()
             self::ROLE_BILLING_ADMIN,
             self::ROLE_PROJECT_ADMIN,
             self::ROLE_PROJECT_VIEWER,
-            self::ROLE_API
+            self::ROLE_API,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/ConfigRequestIDHeaderProvider.php b/src/Client/Model/ConfigRequestIDHeaderProvider.php
index 122b892..40f6a1c 100644
--- a/src/Client/Model/ConfigRequestIDHeaderProvider.php
+++ b/src/Client/Model/ConfigRequestIDHeaderProvider.php
@@ -45,6 +45,8 @@ class ConfigRequestIDHeaderProvider
      */
     public const DEFAULT_REQUEST_ID_HEADER = 'X-Convoy-Idempotency-Key';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -52,7 +54,8 @@ class ConfigRequestIDHeaderProvider
     public static function getAllowableEnumValues()
     {
         return [
-            self::DEFAULT_REQUEST_ID_HEADER
+            self::DEFAULT_REQUEST_ID_HEADER,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/ConfigSignatureHeaderProvider.php b/src/Client/Model/ConfigSignatureHeaderProvider.php
index d6e0dd1..f4ca933 100644
--- a/src/Client/Model/ConfigSignatureHeaderProvider.php
+++ b/src/Client/Model/ConfigSignatureHeaderProvider.php
@@ -45,6 +45,8 @@ class ConfigSignatureHeaderProvider
      */
     public const DEFAULT_SIGNATURE_HEADER = 'X-Convoy-Signature';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -52,7 +54,8 @@ class ConfigSignatureHeaderProvider
     public static function getAllowableEnumValues()
     {
         return [
-            self::DEFAULT_SIGNATURE_HEADER
+            self::DEFAULT_SIGNATURE_HEADER,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreAPIKeyResponse.php b/src/Client/Model/DatastoreAPIKeyResponse.php
index 39cc983..f35f8ed 100644
--- a/src/Client/Model/DatastoreAPIKeyResponse.php
+++ b/src/Client/Model/DatastoreAPIKeyResponse.php
@@ -93,7 +93,7 @@ class DatastoreAPIKeyResponse implements ModelInterface, ArrayAccess, \JsonSeria
      */
     protected static array $openAPINullables = [
         'created_at' => false,
-        'expires_at' => false,
+        'expires_at' => true,
         'key' => false,
         'key_type' => false,
         'name' => false,
@@ -386,7 +386,14 @@ public function getExpiresAt()
     public function setExpiresAt($expires_at)
     {
         if (is_null($expires_at)) {
-            throw new \InvalidArgumentException('non-nullable expires_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'expires_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('expires_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['expires_at'] = $expires_at;
 
diff --git a/src/Client/Model/DatastoreAmqpPubSubConfig.php b/src/Client/Model/DatastoreAmqpPubSubConfig.php
index a71d894..1912683 100644
--- a/src/Client/Model/DatastoreAmqpPubSubConfig.php
+++ b/src/Client/Model/DatastoreAmqpPubSubConfig.php
@@ -95,14 +95,14 @@ class DatastoreAmqpPubSubConfig implements ModelInterface, ArrayAccess, \JsonSer
      */
     protected static array $openAPINullables = [
         'host' => false,
-        'auth' => false,
-        'binded_exchange' => false,
-        'dead_letter_exchange' => false,
+        'auth' => true,
+        'binded_exchange' => true,
+        'dead_letter_exchange' => true,
         'port' => false,
         'queue' => false,
         'routing_key' => false,
         'schema' => false,
-        'vhost' => false
+        'vhost' => true
     ];
 
     /**
@@ -393,7 +393,14 @@ public function getAuth()
     public function setAuth($auth)
     {
         if (is_null($auth)) {
-            throw new \InvalidArgumentException('non-nullable auth cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'auth');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('auth', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['auth'] = $auth;
 
@@ -420,7 +427,14 @@ public function getBindedExchange()
     public function setBindedExchange($binded_exchange)
     {
         if (is_null($binded_exchange)) {
-            throw new \InvalidArgumentException('non-nullable binded_exchange cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'binded_exchange');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('binded_exchange', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['binded_exchange'] = $binded_exchange;
 
@@ -447,7 +461,14 @@ public function getDeadLetterExchange()
     public function setDeadLetterExchange($dead_letter_exchange)
     {
         if (is_null($dead_letter_exchange)) {
-            throw new \InvalidArgumentException('non-nullable dead_letter_exchange cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'dead_letter_exchange');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('dead_letter_exchange', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['dead_letter_exchange'] = $dead_letter_exchange;
 
@@ -582,7 +603,14 @@ public function getVhost()
     public function setVhost($vhost)
     {
         if (is_null($vhost)) {
-            throw new \InvalidArgumentException('non-nullable vhost cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'vhost');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('vhost', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['vhost'] = $vhost;
 
diff --git a/src/Client/Model/DatastoreDeliveryAttempt.php b/src/Client/Model/DatastoreDeliveryAttempt.php
index 1e209db..1563d4f 100644
--- a/src/Client/Model/DatastoreDeliveryAttempt.php
+++ b/src/Client/Model/DatastoreDeliveryAttempt.php
@@ -116,7 +116,7 @@ class DatastoreDeliveryAttempt implements ModelInterface, ArrayAccess, \JsonSeri
     protected static array $openAPINullables = [
         'api_version' => false,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'endpoint_id' => false,
         'error' => false,
         'http_status' => false,
@@ -124,11 +124,11 @@ class DatastoreDeliveryAttempt implements ModelInterface, ArrayAccess, \JsonSeri
         'method' => false,
         'msg_id' => false,
         'project_id' => false,
-        'request_http_header' => false,
-        'requested_at' => false,
-        'responded_at' => false,
+        'request_http_header' => true,
+        'requested_at' => true,
+        'responded_at' => true,
         'response_data' => false,
-        'response_http_header' => false,
+        'response_http_header' => true,
         'status' => false,
         'uid' => false,
         'updated_at' => false,
@@ -490,7 +490,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -706,7 +713,14 @@ public function getRequestHttpHeader()
     public function setRequestHttpHeader($request_http_header)
     {
         if (is_null($request_http_header)) {
-            throw new \InvalidArgumentException('non-nullable request_http_header cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'request_http_header');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('request_http_header', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['request_http_header'] = $request_http_header;
 
@@ -733,7 +747,14 @@ public function getRequestedAt()
     public function setRequestedAt($requested_at)
     {
         if (is_null($requested_at)) {
-            throw new \InvalidArgumentException('non-nullable requested_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'requested_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('requested_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['requested_at'] = $requested_at;
 
@@ -760,7 +781,14 @@ public function getRespondedAt()
     public function setRespondedAt($responded_at)
     {
         if (is_null($responded_at)) {
-            throw new \InvalidArgumentException('non-nullable responded_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'responded_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('responded_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['responded_at'] = $responded_at;
 
@@ -814,7 +842,14 @@ public function getResponseHttpHeader()
     public function setResponseHttpHeader($response_http_header)
     {
         if (is_null($response_http_header)) {
-            throw new \InvalidArgumentException('non-nullable response_http_header cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'response_http_header');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('response_http_header', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['response_http_header'] = $response_http_header;
 
diff --git a/src/Client/Model/DatastoreDeliveryMode.php b/src/Client/Model/DatastoreDeliveryMode.php
index 9ad52b6..26cffca 100644
--- a/src/Client/Model/DatastoreDeliveryMode.php
+++ b/src/Client/Model/DatastoreDeliveryMode.php
@@ -47,6 +47,8 @@ class DatastoreDeliveryMode
 
     public const AT_MOST_ONCE_DELIVERY_MODE = 'at_most_once';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::AT_LEAST_ONCE_DELIVERY_MODE,
-            self::AT_MOST_ONCE_DELIVERY_MODE
+            self::AT_MOST_ONCE_DELIVERY_MODE,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreDevice.php b/src/Client/Model/DatastoreDevice.php
index 628914c..251d26f 100644
--- a/src/Client/Model/DatastoreDevice.php
+++ b/src/Client/Model/DatastoreDevice.php
@@ -95,7 +95,7 @@ class DatastoreDevice implements ModelInterface, ArrayAccess, \JsonSerializable
      */
     protected static array $openAPINullables = [
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'endpoint_id' => false,
         'host_name' => false,
         'last_seen_at' => false,
@@ -393,7 +393,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
diff --git a/src/Client/Model/DatastoreDeviceStatus.php b/src/Client/Model/DatastoreDeviceStatus.php
index d4b8440..9e2b022 100644
--- a/src/Client/Model/DatastoreDeviceStatus.php
+++ b/src/Client/Model/DatastoreDeviceStatus.php
@@ -49,6 +49,8 @@ class DatastoreDeviceStatus
 
     public const DEVICE_STATUS_DISABLED = 'disabled';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -58,7 +60,8 @@ public static function getAllowableEnumValues()
         return [
             self::DEVICE_STATUS_OFFLINE,
             self::DEVICE_STATUS_ONLINE,
-            self::DEVICE_STATUS_DISABLED
+            self::DEVICE_STATUS_DISABLED,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreEncodingType.php b/src/Client/Model/DatastoreEncodingType.php
index bd15221..6d495a5 100644
--- a/src/Client/Model/DatastoreEncodingType.php
+++ b/src/Client/Model/DatastoreEncodingType.php
@@ -47,6 +47,8 @@ class DatastoreEncodingType
 
     public const HEX_ENCODING = 'hex';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::BASE64_ENCODING,
-            self::HEX_ENCODING
+            self::HEX_ENCODING,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreEndpoint.php b/src/Client/Model/DatastoreEndpoint.php
index 3607ee6..0a4df25 100644
--- a/src/Client/Model/DatastoreEndpoint.php
+++ b/src/Client/Model/DatastoreEndpoint.php
@@ -131,28 +131,28 @@ class DatastoreEndpoint implements ModelInterface, ArrayAccess, \JsonSerializabl
      */
     protected static array $openAPINullables = [
         'advanced_signatures' => false,
-        'authentication' => false,
-        'cb_state' => false,
+        'authentication' => true,
+        'cb_state' => true,
         'content_type' => false,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'description' => false,
         'events' => false,
-        'failure_count' => false,
-        'failure_rate' => false,
+        'failure_count' => true,
+        'failure_rate' => true,
         'http_timeout' => false,
-        'mtls_client_cert' => false,
+        'mtls_client_cert' => true,
         'name' => false,
         'owner_id' => false,
-        'period_failure_rate' => false,
+        'period_failure_rate' => true,
         'project_id' => false,
         'rate_limit' => false,
         'rate_limit_duration' => false,
-        'retry_count' => false,
+        'retry_count' => true,
         'secrets' => false,
         'slack_webhook_url' => false,
         'status' => false,
-        'success_count' => false,
+        'success_count' => true,
         'support_email' => false,
         'uid' => false,
         'updated_at' => false,
@@ -519,7 +519,14 @@ public function getAuthentication()
     public function setAuthentication($authentication)
     {
         if (is_null($authentication)) {
-            throw new \InvalidArgumentException('non-nullable authentication cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'authentication');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('authentication', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['authentication'] = $authentication;
 
@@ -546,7 +553,14 @@ public function getCbState()
     public function setCbState($cb_state)
     {
         if (is_null($cb_state)) {
-            throw new \InvalidArgumentException('non-nullable cb_state cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'cb_state');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('cb_state', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['cb_state'] = $cb_state;
 
@@ -627,7 +641,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -708,7 +729,14 @@ public function getFailureCount()
     public function setFailureCount($failure_count)
     {
         if (is_null($failure_count)) {
-            throw new \InvalidArgumentException('non-nullable failure_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'failure_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('failure_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['failure_count'] = $failure_count;
 
@@ -735,7 +763,14 @@ public function getFailureRate()
     public function setFailureRate($failure_rate)
     {
         if (is_null($failure_rate)) {
-            throw new \InvalidArgumentException('non-nullable failure_rate cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'failure_rate');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('failure_rate', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['failure_rate'] = $failure_rate;
 
@@ -789,7 +824,14 @@ public function getMtlsClientCert()
     public function setMtlsClientCert($mtls_client_cert)
     {
         if (is_null($mtls_client_cert)) {
-            throw new \InvalidArgumentException('non-nullable mtls_client_cert cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'mtls_client_cert');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('mtls_client_cert', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['mtls_client_cert'] = $mtls_client_cert;
 
@@ -870,7 +912,14 @@ public function getPeriodFailureRate()
     public function setPeriodFailureRate($period_failure_rate)
     {
         if (is_null($period_failure_rate)) {
-            throw new \InvalidArgumentException('non-nullable period_failure_rate cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'period_failure_rate');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('period_failure_rate', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['period_failure_rate'] = $period_failure_rate;
 
@@ -978,7 +1027,14 @@ public function getRetryCount()
     public function setRetryCount($retry_count)
     {
         if (is_null($retry_count)) {
-            throw new \InvalidArgumentException('non-nullable retry_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'retry_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('retry_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['retry_count'] = $retry_count;
 
@@ -1086,7 +1142,14 @@ public function getSuccessCount()
     public function setSuccessCount($success_count)
     {
         if (is_null($success_count)) {
-            throw new \InvalidArgumentException('non-nullable success_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'success_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('success_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['success_count'] = $success_count;
 
diff --git a/src/Client/Model/DatastoreEndpointAuthentication.php b/src/Client/Model/DatastoreEndpointAuthentication.php
index 6ca29b3..1dd38c0 100644
--- a/src/Client/Model/DatastoreEndpointAuthentication.php
+++ b/src/Client/Model/DatastoreEndpointAuthentication.php
@@ -84,9 +84,9 @@ class DatastoreEndpointAuthentication implements ModelInterface, ArrayAccess, \J
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'api_key' => false,
-        'basic_auth' => false,
-        'oauth2' => false,
+        'api_key' => true,
+        'basic_auth' => true,
+        'oauth2' => true,
         'type' => false
     ];
 
@@ -331,7 +331,14 @@ public function getApiKey()
     public function setApiKey($api_key)
     {
         if (is_null($api_key)) {
-            throw new \InvalidArgumentException('non-nullable api_key cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'api_key');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('api_key', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['api_key'] = $api_key;
 
@@ -358,7 +365,14 @@ public function getBasicAuth()
     public function setBasicAuth($basic_auth)
     {
         if (is_null($basic_auth)) {
-            throw new \InvalidArgumentException('non-nullable basic_auth cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'basic_auth');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('basic_auth', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['basic_auth'] = $basic_auth;
 
@@ -385,7 +399,14 @@ public function getOauth2()
     public function setOauth2($oauth2)
     {
         if (is_null($oauth2)) {
-            throw new \InvalidArgumentException('non-nullable oauth2 cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'oauth2');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('oauth2', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['oauth2'] = $oauth2;
 
diff --git a/src/Client/Model/DatastoreEndpointAuthenticationType.php b/src/Client/Model/DatastoreEndpointAuthenticationType.php
index 9e3f209..b74f5d3 100644
--- a/src/Client/Model/DatastoreEndpointAuthenticationType.php
+++ b/src/Client/Model/DatastoreEndpointAuthenticationType.php
@@ -49,6 +49,8 @@ class DatastoreEndpointAuthenticationType
 
     public const BASIC_AUTHENTICATION = 'basic_auth';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -58,7 +60,8 @@ public static function getAllowableEnumValues()
         return [
             self::API_KEY_AUTHENTICATION,
             self::O_AUTH2_AUTHENTICATION,
-            self::BASIC_AUTHENTICATION
+            self::BASIC_AUTHENTICATION,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreEndpointStatus.php b/src/Client/Model/DatastoreEndpointStatus.php
index 3a8487a..aab8e48 100644
--- a/src/Client/Model/DatastoreEndpointStatus.php
+++ b/src/Client/Model/DatastoreEndpointStatus.php
@@ -49,6 +49,8 @@ class DatastoreEndpointStatus
 
     public const PAUSED_ENDPOINT_STATUS = 'paused';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -58,7 +60,8 @@ public static function getAllowableEnumValues()
         return [
             self::ACTIVE_ENDPOINT_STATUS,
             self::INACTIVE_ENDPOINT_STATUS,
-            self::PAUSED_ENDPOINT_STATUS
+            self::PAUSED_ENDPOINT_STATUS,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreEvent.php b/src/Client/Model/DatastoreEvent.php
index afb79f6..e4a7853 100644
--- a/src/Client/Model/DatastoreEvent.php
+++ b/src/Client/Model/DatastoreEvent.php
@@ -118,22 +118,22 @@ class DatastoreEvent implements ModelInterface, ArrayAccess, \JsonSerializable
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'acknowledged_at' => false,
+        'acknowledged_at' => true,
         'app_id' => false,
         'created_at' => false,
-        'data' => false,
-        'deleted_at' => false,
+        'data' => true,
+        'deleted_at' => true,
         'endpoint_metadata' => false,
         'endpoints' => false,
         'event_type' => false,
-        'headers' => false,
+        'headers' => true,
         'idempotency_key' => false,
         'is_duplicate_event' => false,
         'metadata' => false,
         'project_id' => false,
         'raw' => false,
         'source_id' => false,
-        'source_metadata' => false,
+        'source_metadata' => true,
         'status' => false,
         'uid' => false,
         'updated_at' => false,
@@ -450,7 +450,14 @@ public function getAcknowledgedAt()
     public function setAcknowledgedAt($acknowledged_at)
     {
         if (is_null($acknowledged_at)) {
-            throw new \InvalidArgumentException('non-nullable acknowledged_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'acknowledged_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('acknowledged_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['acknowledged_at'] = $acknowledged_at;
 
@@ -531,7 +538,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
@@ -558,7 +572,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -666,7 +687,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -855,7 +883,14 @@ public function getSourceMetadata()
     public function setSourceMetadata($source_metadata)
     {
         if (is_null($source_metadata)) {
-            throw new \InvalidArgumentException('non-nullable source_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'source_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('source_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['source_metadata'] = $source_metadata;
 
diff --git a/src/Client/Model/DatastoreEventDeliveryStatus.php b/src/Client/Model/DatastoreEventDeliveryStatus.php
index eb72bea..6b64c1a 100644
--- a/src/Client/Model/DatastoreEventDeliveryStatus.php
+++ b/src/Client/Model/DatastoreEventDeliveryStatus.php
@@ -55,6 +55,8 @@ class DatastoreEventDeliveryStatus
 
     public const RETRY_EVENT_STATUS = 'Retry';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -67,7 +69,8 @@ public static function getAllowableEnumValues()
             self::DISCARDED_EVENT_STATUS,
             self::FAILURE_EVENT_STATUS,
             self::SUCCESS_EVENT_STATUS,
-            self::RETRY_EVENT_STATUS
+            self::RETRY_EVENT_STATUS,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreEventStatus.php b/src/Client/Model/DatastoreEventStatus.php
index dd24c30..3359aa5 100644
--- a/src/Client/Model/DatastoreEventStatus.php
+++ b/src/Client/Model/DatastoreEventStatus.php
@@ -53,6 +53,8 @@ class DatastoreEventStatus
 
     public const PENDING_STATUS = 'Pending';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -64,7 +66,8 @@ public static function getAllowableEnumValues()
             self::FAILURE_STATUS,
             self::SUCCESS_STATUS,
             self::RETRY_STATUS,
-            self::PENDING_STATUS
+            self::PENDING_STATUS,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreFilterSchema.php b/src/Client/Model/DatastoreFilterSchema.php
index 16c0cba..f59f937 100644
--- a/src/Client/Model/DatastoreFilterSchema.php
+++ b/src/Client/Model/DatastoreFilterSchema.php
@@ -86,11 +86,11 @@ class DatastoreFilterSchema implements ModelInterface, ArrayAccess, \JsonSeriali
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
-        'headers' => false,
+        'body' => true,
+        'headers' => true,
         'is_flattened' => false,
-        'path' => false,
-        'query' => false
+        'path' => true,
+        'query' => true
     ];
 
     /**
@@ -338,7 +338,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -365,7 +372,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -419,7 +433,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -446,7 +467,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/src/Client/Model/DatastoreKafkaPubSubConfig.php b/src/Client/Model/DatastoreKafkaPubSubConfig.php
index 3a1396e..7746810 100644
--- a/src/Client/Model/DatastoreKafkaPubSubConfig.php
+++ b/src/Client/Model/DatastoreKafkaPubSubConfig.php
@@ -84,7 +84,7 @@ class DatastoreKafkaPubSubConfig implements ModelInterface, ArrayAccess, \JsonSe
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'auth' => false,
+        'auth' => true,
         'brokers' => false,
         'consumer_group_id' => false,
         'topic_name' => false
@@ -331,7 +331,14 @@ public function getAuth()
     public function setAuth($auth)
     {
         if (is_null($auth)) {
-            throw new \InvalidArgumentException('non-nullable auth cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'auth');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('auth', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['auth'] = $auth;
 
diff --git a/src/Client/Model/DatastoreMetaEventAttempt.php b/src/Client/Model/DatastoreMetaEventAttempt.php
index a21e940..962043b 100644
--- a/src/Client/Model/DatastoreMetaEventAttempt.php
+++ b/src/Client/Model/DatastoreMetaEventAttempt.php
@@ -82,9 +82,9 @@ class DatastoreMetaEventAttempt implements ModelInterface, ArrayAccess, \JsonSer
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'request_http_header' => false,
+        'request_http_header' => true,
         'response_data' => false,
-        'response_http_header' => false
+        'response_http_header' => true
     ];
 
     /**
@@ -324,7 +324,14 @@ public function getRequestHttpHeader()
     public function setRequestHttpHeader($request_http_header)
     {
         if (is_null($request_http_header)) {
-            throw new \InvalidArgumentException('non-nullable request_http_header cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'request_http_header');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('request_http_header', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['request_http_header'] = $request_http_header;
 
@@ -378,7 +385,14 @@ public function getResponseHttpHeader()
     public function setResponseHttpHeader($response_http_header)
     {
         if (is_null($response_http_header)) {
-            throw new \InvalidArgumentException('non-nullable response_http_header cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'response_http_header');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('response_http_header', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['response_http_header'] = $response_http_header;
 
diff --git a/src/Client/Model/DatastoreMetaEventConfiguration.php b/src/Client/Model/DatastoreMetaEventConfiguration.php
index ccd0a0e..a382a70 100644
--- a/src/Client/Model/DatastoreMetaEventConfiguration.php
+++ b/src/Client/Model/DatastoreMetaEventConfiguration.php
@@ -90,7 +90,7 @@ class DatastoreMetaEventConfiguration implements ModelInterface, ArrayAccess, \J
     protected static array $openAPINullables = [
         'event_type' => false,
         'is_enabled' => false,
-        'pub_sub' => false,
+        'pub_sub' => true,
         'secret' => false,
         'type' => false,
         'url' => false
@@ -399,7 +399,14 @@ public function getPubSub()
     public function setPubSub($pub_sub)
     {
         if (is_null($pub_sub)) {
-            throw new \InvalidArgumentException('non-nullable pub_sub cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'pub_sub');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('pub_sub', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['pub_sub'] = $pub_sub;
 
diff --git a/src/Client/Model/DatastoreMetaEventType.php b/src/Client/Model/DatastoreMetaEventType.php
index b63e651..5e7f780 100644
--- a/src/Client/Model/DatastoreMetaEventType.php
+++ b/src/Client/Model/DatastoreMetaEventType.php
@@ -47,6 +47,8 @@ class DatastoreMetaEventType
 
     public const PUB_SUB_META_EVENT = 'pub_sub';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::HTTP_META_EVENT,
-            self::PUB_SUB_META_EVENT
+            self::PUB_SUB_META_EVENT,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreMetadata.php b/src/Client/Model/DatastoreMetadata.php
index fa5bbab..f5bc20a 100644
--- a/src/Client/Model/DatastoreMetadata.php
+++ b/src/Client/Model/DatastoreMetadata.php
@@ -92,7 +92,7 @@ class DatastoreMetadata implements ModelInterface, ArrayAccess, \JsonSerializabl
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'data' => false,
+        'data' => true,
         'interval_seconds' => false,
         'max_retry_seconds' => false,
         'next_send_time' => false,
@@ -359,7 +359,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/DatastoreOAuth2.php b/src/Client/Model/DatastoreOAuth2.php
index d7c49a1..f90a3c8 100644
--- a/src/Client/Model/DatastoreOAuth2.php
+++ b/src/Client/Model/DatastoreOAuth2.php
@@ -107,12 +107,12 @@ class DatastoreOAuth2 implements ModelInterface, ArrayAccess, \JsonSerializable
         'client_id' => false,
         'client_secret' => false,
         'expiry_time_unit' => false,
-        'field_mapping' => false,
+        'field_mapping' => true,
         'grant_type' => false,
         'issuer' => false,
         'scope' => false,
         'signing_algorithm' => false,
-        'signing_key' => false,
+        'signing_key' => true,
         'subject' => false,
         'url' => false
     ];
@@ -529,7 +529,14 @@ public function getFieldMapping()
     public function setFieldMapping($field_mapping)
     {
         if (is_null($field_mapping)) {
-            throw new \InvalidArgumentException('non-nullable field_mapping cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'field_mapping');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('field_mapping', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['field_mapping'] = $field_mapping;
 
@@ -664,7 +671,14 @@ public function getSigningKey()
     public function setSigningKey($signing_key)
     {
         if (is_null($signing_key)) {
-            throw new \InvalidArgumentException('non-nullable signing_key cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'signing_key');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('signing_key', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['signing_key'] = $signing_key;
 
diff --git a/src/Client/Model/DatastoreOAuth2AuthenticationType.php b/src/Client/Model/DatastoreOAuth2AuthenticationType.php
index 9f87c62..5e8a4ab 100644
--- a/src/Client/Model/DatastoreOAuth2AuthenticationType.php
+++ b/src/Client/Model/DatastoreOAuth2AuthenticationType.php
@@ -47,6 +47,8 @@ class DatastoreOAuth2AuthenticationType
 
     public const CLIENT_ASSERTION_AUTH = 'client_assertion';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::SHARED_SECRET_AUTH,
-            self::CLIENT_ASSERTION_AUTH
+            self::CLIENT_ASSERTION_AUTH,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreOAuth2ExpiryTimeUnit.php b/src/Client/Model/DatastoreOAuth2ExpiryTimeUnit.php
index 87d2bdf..f5e60e1 100644
--- a/src/Client/Model/DatastoreOAuth2ExpiryTimeUnit.php
+++ b/src/Client/Model/DatastoreOAuth2ExpiryTimeUnit.php
@@ -51,6 +51,8 @@ class DatastoreOAuth2ExpiryTimeUnit
 
     public const EXPIRY_TIME_UNIT_HOURS = 'hours';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -61,7 +63,8 @@ public static function getAllowableEnumValues()
             self::EXPIRY_TIME_UNIT_SECONDS,
             self::EXPIRY_TIME_UNIT_MILLISECONDS,
             self::EXPIRY_TIME_UNIT_MINUTES,
-            self::EXPIRY_TIME_UNIT_HOURS
+            self::EXPIRY_TIME_UNIT_HOURS,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastorePageDirection.php b/src/Client/Model/DatastorePageDirection.php
index 30e869e..22a6e36 100644
--- a/src/Client/Model/DatastorePageDirection.php
+++ b/src/Client/Model/DatastorePageDirection.php
@@ -47,6 +47,8 @@ class DatastorePageDirection
 
     public const PREV = 'prev';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::NEXT,
-            self::PREV
+            self::PREV,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastorePortalAuthType.php b/src/Client/Model/DatastorePortalAuthType.php
index c7c4f73..fe854b6 100644
--- a/src/Client/Model/DatastorePortalAuthType.php
+++ b/src/Client/Model/DatastorePortalAuthType.php
@@ -47,6 +47,8 @@ class DatastorePortalAuthType
 
     public const PORTAL_AUTH_TYPE_STATIC_TOKEN = 'static_token';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::PORTAL_AUTH_TYPE_REFRESH_TOKEN,
-            self::PORTAL_AUTH_TYPE_STATIC_TOKEN
+            self::PORTAL_AUTH_TYPE_STATIC_TOKEN,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastorePortalLinkResponse.php b/src/Client/Model/DatastorePortalLinkResponse.php
index 3716ad4..fdd8755 100644
--- a/src/Client/Model/DatastorePortalLinkResponse.php
+++ b/src/Client/Model/DatastorePortalLinkResponse.php
@@ -110,7 +110,7 @@ class DatastorePortalLinkResponse implements ModelInterface, ArrayAccess, \JsonS
         'auth_type' => false,
         'can_manage_endpoint' => false,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'endpoint_count' => false,
         'endpoints' => false,
         'endpoints_metadata' => false,
@@ -516,7 +516,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
diff --git a/src/Client/Model/DatastoreProjectConfig.php b/src/Client/Model/DatastoreProjectConfig.php
index 52c2b82..5dc14fc 100644
--- a/src/Client/Model/DatastoreProjectConfig.php
+++ b/src/Client/Model/DatastoreProjectConfig.php
@@ -103,18 +103,18 @@ class DatastoreProjectConfig implements ModelInterface, ArrayAccess, \JsonSerial
      */
     protected static array $openAPINullables = [
         'add_event_id_trace_headers' => false,
-        'circuit_breaker' => false,
+        'circuit_breaker' => true,
         'disable_endpoint' => false,
         'max_payload_read_size' => false,
-        'meta_event' => false,
+        'meta_event' => true,
         'multiple_endpoint_subscriptions' => false,
-        'ratelimit' => false,
+        'ratelimit' => true,
         'replay_attacks_prevention_enabled' => false,
         'request_id_header' => false,
         'search_policy' => false,
-        'signature' => false,
-        'ssl' => false,
-        'strategy' => false
+        'signature' => true,
+        'ssl' => true,
+        'strategy' => true
     ];
 
     /**
@@ -421,7 +421,14 @@ public function getCircuitBreaker()
     public function setCircuitBreaker($circuit_breaker)
     {
         if (is_null($circuit_breaker)) {
-            throw new \InvalidArgumentException('non-nullable circuit_breaker cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'circuit_breaker');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('circuit_breaker', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['circuit_breaker'] = $circuit_breaker;
 
@@ -502,7 +509,14 @@ public function getMetaEvent()
     public function setMetaEvent($meta_event)
     {
         if (is_null($meta_event)) {
-            throw new \InvalidArgumentException('non-nullable meta_event cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'meta_event');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('meta_event', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['meta_event'] = $meta_event;
 
@@ -556,7 +570,14 @@ public function getRatelimit()
     public function setRatelimit($ratelimit)
     {
         if (is_null($ratelimit)) {
-            throw new \InvalidArgumentException('non-nullable ratelimit cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'ratelimit');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('ratelimit', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['ratelimit'] = $ratelimit;
 
@@ -664,7 +685,14 @@ public function getSignature()
     public function setSignature($signature)
     {
         if (is_null($signature)) {
-            throw new \InvalidArgumentException('non-nullable signature cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'signature');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('signature', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['signature'] = $signature;
 
@@ -691,7 +719,14 @@ public function getSsl()
     public function setSsl($ssl)
     {
         if (is_null($ssl)) {
-            throw new \InvalidArgumentException('non-nullable ssl cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'ssl');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('ssl', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['ssl'] = $ssl;
 
@@ -718,7 +753,14 @@ public function getStrategy()
     public function setStrategy($strategy)
     {
         if (is_null($strategy)) {
-            throw new \InvalidArgumentException('non-nullable strategy cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'strategy');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('strategy', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['strategy'] = $strategy;
 
diff --git a/src/Client/Model/DatastoreProjectType.php b/src/Client/Model/DatastoreProjectType.php
index 03a854c..f452757 100644
--- a/src/Client/Model/DatastoreProjectType.php
+++ b/src/Client/Model/DatastoreProjectType.php
@@ -47,6 +47,8 @@ class DatastoreProjectType
 
     public const INCOMING_PROJECT = 'incoming';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::OUTGOING_PROJECT,
-            self::INCOMING_PROJECT
+            self::INCOMING_PROJECT,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreProviderConfig.php b/src/Client/Model/DatastoreProviderConfig.php
index 4258612..9f6ba5d 100644
--- a/src/Client/Model/DatastoreProviderConfig.php
+++ b/src/Client/Model/DatastoreProviderConfig.php
@@ -78,7 +78,7 @@ class DatastoreProviderConfig implements ModelInterface, ArrayAccess, \JsonSeria
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'twitter' => false
+        'twitter' => true
     ];
 
     /**
@@ -310,7 +310,14 @@ public function getTwitter()
     public function setTwitter($twitter)
     {
         if (is_null($twitter)) {
-            throw new \InvalidArgumentException('non-nullable twitter cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'twitter');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('twitter', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['twitter'] = $twitter;
 
diff --git a/src/Client/Model/DatastorePubSubConfig.php b/src/Client/Model/DatastorePubSubConfig.php
index 71e8246..991b8ff 100644
--- a/src/Client/Model/DatastorePubSubConfig.php
+++ b/src/Client/Model/DatastorePubSubConfig.php
@@ -88,10 +88,10 @@ class DatastorePubSubConfig implements ModelInterface, ArrayAccess, \JsonSeriali
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'amqp' => false,
-        'google' => false,
-        'kafka' => false,
-        'sqs' => false,
+        'amqp' => true,
+        'google' => true,
+        'kafka' => true,
+        'sqs' => true,
         'type' => false,
         'workers' => false
     ];
@@ -345,7 +345,14 @@ public function getAmqp()
     public function setAmqp($amqp)
     {
         if (is_null($amqp)) {
-            throw new \InvalidArgumentException('non-nullable amqp cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'amqp');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('amqp', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['amqp'] = $amqp;
 
@@ -372,7 +379,14 @@ public function getGoogle()
     public function setGoogle($google)
     {
         if (is_null($google)) {
-            throw new \InvalidArgumentException('non-nullable google cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'google');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('google', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['google'] = $google;
 
@@ -399,7 +413,14 @@ public function getKafka()
     public function setKafka($kafka)
     {
         if (is_null($kafka)) {
-            throw new \InvalidArgumentException('non-nullable kafka cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'kafka');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('kafka', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['kafka'] = $kafka;
 
@@ -426,7 +447,14 @@ public function getSqs()
     public function setSqs($sqs)
     {
         if (is_null($sqs)) {
-            throw new \InvalidArgumentException('non-nullable sqs cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'sqs');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('sqs', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['sqs'] = $sqs;
 
diff --git a/src/Client/Model/DatastorePubSubType.php b/src/Client/Model/DatastorePubSubType.php
index f61abb9..8017012 100644
--- a/src/Client/Model/DatastorePubSubType.php
+++ b/src/Client/Model/DatastorePubSubType.php
@@ -51,6 +51,8 @@ class DatastorePubSubType
 
     public const AMQP_PUB_SUB = 'amqp';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -61,7 +63,8 @@ public static function getAllowableEnumValues()
             self::SQS_PUB_SUB,
             self::GOOGLE_PUB_SUB,
             self::KAFKA_PUB_SUB,
-            self::AMQP_PUB_SUB
+            self::AMQP_PUB_SUB,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreSecret.php b/src/Client/Model/DatastoreSecret.php
index a8f5db4..d713476 100644
--- a/src/Client/Model/DatastoreSecret.php
+++ b/src/Client/Model/DatastoreSecret.php
@@ -89,8 +89,8 @@ class DatastoreSecret implements ModelInterface, ArrayAccess, \JsonSerializable
      */
     protected static array $openAPINullables = [
         'created_at' => false,
-        'deleted_at' => false,
-        'expires_at' => false,
+        'deleted_at' => true,
+        'expires_at' => true,
         'uid' => false,
         'updated_at' => false,
         'value' => false
@@ -372,7 +372,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -399,7 +406,14 @@ public function getExpiresAt()
     public function setExpiresAt($expires_at)
     {
         if (is_null($expires_at)) {
-            throw new \InvalidArgumentException('non-nullable expires_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'expires_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('expires_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['expires_at'] = $expires_at;
 
diff --git a/src/Client/Model/DatastoreSource.php b/src/Client/Model/DatastoreSource.php
index bba8f61..79a5d11 100644
--- a/src/Client/Model/DatastoreSource.php
+++ b/src/Client/Model/DatastoreSource.php
@@ -116,26 +116,26 @@ class DatastoreSource implements ModelInterface, ArrayAccess, \JsonSerializable
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body_function' => false,
+        'body_function' => true,
         'created_at' => false,
         'custom_response' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'event_type_location' => false,
         'forward_headers' => false,
-        'header_function' => false,
+        'header_function' => true,
         'idempotency_keys' => false,
         'is_disabled' => false,
         'mask_id' => false,
         'name' => false,
         'project_id' => false,
         'provider' => false,
-        'provider_config' => false,
-        'pub_sub' => false,
+        'provider_config' => true,
+        'pub_sub' => true,
         'type' => false,
         'uid' => false,
         'updated_at' => false,
         'url' => false,
-        'verifier' => false
+        'verifier' => true
     ];
 
     /**
@@ -443,7 +443,14 @@ public function getBodyFunction()
     public function setBodyFunction($body_function)
     {
         if (is_null($body_function)) {
-            throw new \InvalidArgumentException('non-nullable body_function cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body_function');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body_function', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body_function'] = $body_function;
 
@@ -524,7 +531,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -605,7 +619,14 @@ public function getHeaderFunction()
     public function setHeaderFunction($header_function)
     {
         if (is_null($header_function)) {
-            throw new \InvalidArgumentException('non-nullable header_function cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'header_function');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('header_function', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['header_function'] = $header_function;
 
@@ -794,7 +815,14 @@ public function getProviderConfig()
     public function setProviderConfig($provider_config)
     {
         if (is_null($provider_config)) {
-            throw new \InvalidArgumentException('non-nullable provider_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'provider_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('provider_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['provider_config'] = $provider_config;
 
@@ -821,7 +849,14 @@ public function getPubSub()
     public function setPubSub($pub_sub)
     {
         if (is_null($pub_sub)) {
-            throw new \InvalidArgumentException('non-nullable pub_sub cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'pub_sub');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('pub_sub', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['pub_sub'] = $pub_sub;
 
@@ -956,7 +991,14 @@ public function getVerifier()
     public function setVerifier($verifier)
     {
         if (is_null($verifier)) {
-            throw new \InvalidArgumentException('non-nullable verifier cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'verifier');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('verifier', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['verifier'] = $verifier;
 
diff --git a/src/Client/Model/DatastoreSourceProvider.php b/src/Client/Model/DatastoreSourceProvider.php
index c2fa9ff..abbd27e 100644
--- a/src/Client/Model/DatastoreSourceProvider.php
+++ b/src/Client/Model/DatastoreSourceProvider.php
@@ -49,6 +49,8 @@ class DatastoreSourceProvider
 
     public const SHOPIFY_SOURCE_PROVIDER = 'shopify';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -58,7 +60,8 @@ public static function getAllowableEnumValues()
         return [
             self::GITHUB_SOURCE_PROVIDER,
             self::TWITTER_SOURCE_PROVIDER,
-            self::SHOPIFY_SOURCE_PROVIDER
+            self::SHOPIFY_SOURCE_PROVIDER,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreSourceType.php b/src/Client/Model/DatastoreSourceType.php
index 00a2858..b386274 100644
--- a/src/Client/Model/DatastoreSourceType.php
+++ b/src/Client/Model/DatastoreSourceType.php
@@ -51,6 +51,8 @@ class DatastoreSourceType
 
     public const DB_CHANGE_STREAM = 'db_change_stream';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -61,7 +63,8 @@ public static function getAllowableEnumValues()
             self::HTTP_SOURCE,
             self::REST_API_SOURCE,
             self::PUB_SUB_SOURCE,
-            self::DB_CHANGE_STREAM
+            self::DB_CHANGE_STREAM,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreStrategyProvider.php b/src/Client/Model/DatastoreStrategyProvider.php
index a81aba6..76aa6fe 100644
--- a/src/Client/Model/DatastoreStrategyProvider.php
+++ b/src/Client/Model/DatastoreStrategyProvider.php
@@ -47,6 +47,8 @@ class DatastoreStrategyProvider
 
     public const EXPONENTIAL_STRATEGY_PROVIDER = 'exponential';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::LINEAR_STRATEGY_PROVIDER,
-            self::EXPONENTIAL_STRATEGY_PROVIDER
+            self::EXPONENTIAL_STRATEGY_PROVIDER,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreSubscriptionType.php b/src/Client/Model/DatastoreSubscriptionType.php
index 7c85805..53e0eaf 100644
--- a/src/Client/Model/DatastoreSubscriptionType.php
+++ b/src/Client/Model/DatastoreSubscriptionType.php
@@ -47,6 +47,8 @@ class DatastoreSubscriptionType
 
     public const SUBSCRIPTION_TYPE_API = 'api';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -55,7 +57,8 @@ public static function getAllowableEnumValues()
     {
         return [
             self::SUBSCRIPTION_TYPE_CLI,
-            self::SUBSCRIPTION_TYPE_API
+            self::SUBSCRIPTION_TYPE_API,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/DatastoreTwitterProviderConfig.php b/src/Client/Model/DatastoreTwitterProviderConfig.php
index a49fb9b..96a55ad 100644
--- a/src/Client/Model/DatastoreTwitterProviderConfig.php
+++ b/src/Client/Model/DatastoreTwitterProviderConfig.php
@@ -78,7 +78,7 @@ class DatastoreTwitterProviderConfig implements ModelInterface, ArrayAccess, \Js
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'crc_verified_at' => false
+        'crc_verified_at' => true
     ];
 
     /**
@@ -310,7 +310,14 @@ public function getCrcVerifiedAt()
     public function setCrcVerifiedAt($crc_verified_at)
     {
         if (is_null($crc_verified_at)) {
-            throw new \InvalidArgumentException('non-nullable crc_verified_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'crc_verified_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('crc_verified_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['crc_verified_at'] = $crc_verified_at;
 
diff --git a/src/Client/Model/DatastoreVerifierConfig.php b/src/Client/Model/DatastoreVerifierConfig.php
index 1d0c3e5..74d670a 100644
--- a/src/Client/Model/DatastoreVerifierConfig.php
+++ b/src/Client/Model/DatastoreVerifierConfig.php
@@ -84,9 +84,9 @@ class DatastoreVerifierConfig implements ModelInterface, ArrayAccess, \JsonSeria
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'api_key' => false,
-        'basic_auth' => false,
-        'hmac' => false,
+        'api_key' => true,
+        'basic_auth' => true,
+        'hmac' => true,
         'type' => false
     ];
 
@@ -331,7 +331,14 @@ public function getApiKey()
     public function setApiKey($api_key)
     {
         if (is_null($api_key)) {
-            throw new \InvalidArgumentException('non-nullable api_key cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'api_key');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('api_key', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['api_key'] = $api_key;
 
@@ -358,7 +365,14 @@ public function getBasicAuth()
     public function setBasicAuth($basic_auth)
     {
         if (is_null($basic_auth)) {
-            throw new \InvalidArgumentException('non-nullable basic_auth cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'basic_auth');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('basic_auth', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['basic_auth'] = $basic_auth;
 
@@ -385,7 +399,14 @@ public function getHmac()
     public function setHmac($hmac)
     {
         if (is_null($hmac)) {
-            throw new \InvalidArgumentException('non-nullable hmac cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'hmac');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('hmac', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['hmac'] = $hmac;
 
diff --git a/src/Client/Model/DatastoreVerifierType.php b/src/Client/Model/DatastoreVerifierType.php
index 8f7fb3b..b4d92a8 100644
--- a/src/Client/Model/DatastoreVerifierType.php
+++ b/src/Client/Model/DatastoreVerifierType.php
@@ -51,6 +51,8 @@ class DatastoreVerifierType
 
     public const API_KEY_VERIFIER = 'api_key';
 
+    public const EMPTY = '';
+
     /**
      * Gets allowable values of the enum
      * @return string[]
@@ -61,7 +63,8 @@ public static function getAllowableEnumValues()
             self::NOOP_VERIFIER,
             self::H_MAC_VERIFIER,
             self::BASIC_AUTH_VERIFIER,
-            self::API_KEY_VERIFIER
+            self::API_KEY_VERIFIER,
+            self::EMPTY
         ];
     }
 }
diff --git a/src/Client/Model/GetProjects400Response.php b/src/Client/Model/GetProjects400Response.php
index 2c10f8c..6ed6aac 100644
--- a/src/Client/Model/GetProjects400Response.php
+++ b/src/Client/Model/GetProjects400Response.php
@@ -60,7 +60,7 @@ class GetProjects400Response implements ModelInterface, ArrayAccess, \JsonSerial
     protected static $openAPITypes = [
         'message' => 'string',
         'status' => 'bool',
-        'data' => 'object'
+        'data' => 'array<string,mixed>'
     ];
 
     /**
@@ -84,7 +84,7 @@ class GetProjects400Response implements ModelInterface, ArrayAccess, \JsonSerial
     protected static array $openAPINullables = [
         'message' => false,
         'status' => false,
-        'data' => false
+        'data' => true
     ];
 
     /**
@@ -361,7 +361,7 @@ public function setStatus($status)
     /**
      * Gets data
      *
-     * @return object|null
+     * @return array<string,mixed>|null
      */
     public function getData()
     {
@@ -371,14 +371,21 @@ public function getData()
     /**
      * Sets data
      *
-     * @param object|null $data data
+     * @param array<string,mixed>|null $data data
      *
      * @return self
      */
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/ModelsBroadcastEvent.php b/src/Client/Model/ModelsBroadcastEvent.php
index 9e6bb3e..89d45bc 100644
--- a/src/Client/Model/ModelsBroadcastEvent.php
+++ b/src/Client/Model/ModelsBroadcastEvent.php
@@ -87,8 +87,8 @@ class ModelsBroadcastEvent implements ModelInterface, ArrayAccess, \JsonSerializ
      */
     protected static array $openAPINullables = [
         'acknowledged_at' => false,
-        'custom_headers' => false,
-        'data' => false,
+        'custom_headers' => true,
+        'data' => true,
         'event_type' => false,
         'idempotency_key' => false
     ];
@@ -365,7 +365,14 @@ public function getCustomHeaders()
     public function setCustomHeaders($custom_headers)
     {
         if (is_null($custom_headers)) {
-            throw new \InvalidArgumentException('non-nullable custom_headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'custom_headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('custom_headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['custom_headers'] = $custom_headers;
 
@@ -392,7 +399,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/ModelsBulkUpdateFilterRequest.php b/src/Client/Model/ModelsBulkUpdateFilterRequest.php
index 3727604..1a7af01 100644
--- a/src/Client/Model/ModelsBulkUpdateFilterRequest.php
+++ b/src/Client/Model/ModelsBulkUpdateFilterRequest.php
@@ -90,12 +90,12 @@ class ModelsBulkUpdateFilterRequest implements ModelInterface, ArrayAccess, \Jso
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
+        'body' => true,
         'enabled_at' => false,
         'event_type' => false,
-        'headers' => false,
-        'path' => false,
-        'query' => false,
+        'headers' => true,
+        'path' => true,
+        'query' => true,
         'uid' => false
     ];
 
@@ -355,7 +355,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -436,7 +443,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -463,7 +477,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -490,7 +511,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/src/Client/Model/ModelsCreateEvent.php b/src/Client/Model/ModelsCreateEvent.php
index 93cc605..815b79a 100644
--- a/src/Client/Model/ModelsCreateEvent.php
+++ b/src/Client/Model/ModelsCreateEvent.php
@@ -89,8 +89,8 @@ class ModelsCreateEvent implements ModelInterface, ArrayAccess, \JsonSerializabl
      */
     protected static array $openAPINullables = [
         'app_id' => false,
-        'custom_headers' => false,
-        'data' => false,
+        'custom_headers' => true,
+        'data' => true,
         'endpoint_id' => false,
         'event_type' => false,
         'idempotency_key' => false
@@ -372,7 +372,14 @@ public function getCustomHeaders()
     public function setCustomHeaders($custom_headers)
     {
         if (is_null($custom_headers)) {
-            throw new \InvalidArgumentException('non-nullable custom_headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'custom_headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('custom_headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['custom_headers'] = $custom_headers;
 
@@ -399,7 +406,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/ModelsCreateEventType.php b/src/Client/Model/ModelsCreateEventType.php
index b451099..cd8be01 100644
--- a/src/Client/Model/ModelsCreateEventType.php
+++ b/src/Client/Model/ModelsCreateEventType.php
@@ -86,7 +86,7 @@ class ModelsCreateEventType implements ModelInterface, ArrayAccess, \JsonSeriali
     protected static array $openAPINullables = [
         'category' => false,
         'description' => false,
-        'json_schema' => false,
+        'json_schema' => true,
         'name' => false
     ];
 
@@ -385,7 +385,14 @@ public function getJsonSchema()
     public function setJsonSchema($json_schema)
     {
         if (is_null($json_schema)) {
-            throw new \InvalidArgumentException('non-nullable json_schema cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'json_schema');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('json_schema', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['json_schema'] = $json_schema;
 
diff --git a/src/Client/Model/ModelsCreateFilterRequest.php b/src/Client/Model/ModelsCreateFilterRequest.php
index 5baa449..3f60931 100644
--- a/src/Client/Model/ModelsCreateFilterRequest.php
+++ b/src/Client/Model/ModelsCreateFilterRequest.php
@@ -88,12 +88,12 @@ class ModelsCreateFilterRequest implements ModelInterface, ArrayAccess, \JsonSer
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
+        'body' => true,
         'enabled_at' => false,
         'event_type' => false,
-        'headers' => false,
-        'path' => false,
-        'query' => false
+        'headers' => true,
+        'path' => true,
+        'query' => true
     ];
 
     /**
@@ -348,7 +348,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -429,7 +436,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -456,7 +470,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -483,7 +504,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/src/Client/Model/ModelsDynamicEvent.php b/src/Client/Model/ModelsDynamicEvent.php
index 36f9ea2..2510e18 100644
--- a/src/Client/Model/ModelsDynamicEvent.php
+++ b/src/Client/Model/ModelsDynamicEvent.php
@@ -90,8 +90,8 @@ class ModelsDynamicEvent implements ModelInterface, ArrayAccess, \JsonSerializab
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'custom_headers' => false,
-        'data' => false,
+        'custom_headers' => true,
+        'data' => true,
         'event_type' => false,
         'event_types' => false,
         'idempotency_key' => false,
@@ -352,7 +352,14 @@ public function getCustomHeaders()
     public function setCustomHeaders($custom_headers)
     {
         if (is_null($custom_headers)) {
-            throw new \InvalidArgumentException('non-nullable custom_headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'custom_headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('custom_headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['custom_headers'] = $custom_headers;
 
@@ -379,7 +386,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/ModelsEndpointResponse.php b/src/Client/Model/ModelsEndpointResponse.php
index 0c56242..792d75c 100644
--- a/src/Client/Model/ModelsEndpointResponse.php
+++ b/src/Client/Model/ModelsEndpointResponse.php
@@ -131,28 +131,28 @@ class ModelsEndpointResponse implements ModelInterface, ArrayAccess, \JsonSerial
      */
     protected static array $openAPINullables = [
         'advanced_signatures' => false,
-        'authentication' => false,
-        'cb_state' => false,
+        'authentication' => true,
+        'cb_state' => true,
         'content_type' => false,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'description' => false,
         'events' => false,
-        'failure_count' => false,
-        'failure_rate' => false,
+        'failure_count' => true,
+        'failure_rate' => true,
         'http_timeout' => false,
-        'mtls_client_cert' => false,
+        'mtls_client_cert' => true,
         'name' => false,
         'owner_id' => false,
-        'period_failure_rate' => false,
+        'period_failure_rate' => true,
         'project_id' => false,
         'rate_limit' => false,
         'rate_limit_duration' => false,
-        'retry_count' => false,
+        'retry_count' => true,
         'secrets' => false,
         'slack_webhook_url' => false,
         'status' => false,
-        'success_count' => false,
+        'success_count' => true,
         'support_email' => false,
         'uid' => false,
         'updated_at' => false,
@@ -519,7 +519,14 @@ public function getAuthentication()
     public function setAuthentication($authentication)
     {
         if (is_null($authentication)) {
-            throw new \InvalidArgumentException('non-nullable authentication cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'authentication');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('authentication', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['authentication'] = $authentication;
 
@@ -546,7 +553,14 @@ public function getCbState()
     public function setCbState($cb_state)
     {
         if (is_null($cb_state)) {
-            throw new \InvalidArgumentException('non-nullable cb_state cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'cb_state');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('cb_state', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['cb_state'] = $cb_state;
 
@@ -627,7 +641,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -708,7 +729,14 @@ public function getFailureCount()
     public function setFailureCount($failure_count)
     {
         if (is_null($failure_count)) {
-            throw new \InvalidArgumentException('non-nullable failure_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'failure_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('failure_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['failure_count'] = $failure_count;
 
@@ -735,7 +763,14 @@ public function getFailureRate()
     public function setFailureRate($failure_rate)
     {
         if (is_null($failure_rate)) {
-            throw new \InvalidArgumentException('non-nullable failure_rate cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'failure_rate');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('failure_rate', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['failure_rate'] = $failure_rate;
 
@@ -789,7 +824,14 @@ public function getMtlsClientCert()
     public function setMtlsClientCert($mtls_client_cert)
     {
         if (is_null($mtls_client_cert)) {
-            throw new \InvalidArgumentException('non-nullable mtls_client_cert cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'mtls_client_cert');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('mtls_client_cert', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['mtls_client_cert'] = $mtls_client_cert;
 
@@ -870,7 +912,14 @@ public function getPeriodFailureRate()
     public function setPeriodFailureRate($period_failure_rate)
     {
         if (is_null($period_failure_rate)) {
-            throw new \InvalidArgumentException('non-nullable period_failure_rate cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'period_failure_rate');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('period_failure_rate', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['period_failure_rate'] = $period_failure_rate;
 
@@ -978,7 +1027,14 @@ public function getRetryCount()
     public function setRetryCount($retry_count)
     {
         if (is_null($retry_count)) {
-            throw new \InvalidArgumentException('non-nullable retry_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'retry_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('retry_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['retry_count'] = $retry_count;
 
@@ -1086,7 +1142,14 @@ public function getSuccessCount()
     public function setSuccessCount($success_count)
     {
         if (is_null($success_count)) {
-            throw new \InvalidArgumentException('non-nullable success_count cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'success_count');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('success_count', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['success_count'] = $success_count;
 
diff --git a/src/Client/Model/ModelsEventDeliveryResponse.php b/src/Client/Model/ModelsEventDeliveryResponse.php
index 80f8aec..38b8ce5 100644
--- a/src/Client/Model/ModelsEventDeliveryResponse.php
+++ b/src/Client/Model/ModelsEventDeliveryResponse.php
@@ -128,26 +128,26 @@ class ModelsEventDeliveryResponse implements ModelInterface, ArrayAccess, \JsonS
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'acknowledged_at' => false,
-        'cli_metadata' => false,
+        'acknowledged_at' => true,
+        'cli_metadata' => true,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'delivery_mode' => false,
         'description' => false,
         'device_id' => false,
-        'device_metadata' => false,
+        'device_metadata' => true,
         'endpoint_id' => false,
-        'endpoint_metadata' => false,
+        'endpoint_metadata' => true,
         'event_id' => false,
-        'event_metadata' => false,
+        'event_metadata' => true,
         'event_type' => false,
-        'headers' => false,
+        'headers' => true,
         'idempotency_key' => false,
         'latency' => false,
         'latency_seconds' => false,
-        'metadata' => false,
+        'metadata' => true,
         'project_id' => false,
-        'source_metadata' => false,
+        'source_metadata' => true,
         'status' => false,
         'subscription_id' => false,
         'target_url' => false,
@@ -485,7 +485,14 @@ public function getAcknowledgedAt()
     public function setAcknowledgedAt($acknowledged_at)
     {
         if (is_null($acknowledged_at)) {
-            throw new \InvalidArgumentException('non-nullable acknowledged_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'acknowledged_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('acknowledged_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['acknowledged_at'] = $acknowledged_at;
 
@@ -512,7 +519,14 @@ public function getCliMetadata()
     public function setCliMetadata($cli_metadata)
     {
         if (is_null($cli_metadata)) {
-            throw new \InvalidArgumentException('non-nullable cli_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'cli_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('cli_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['cli_metadata'] = $cli_metadata;
 
@@ -566,7 +580,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -674,7 +695,14 @@ public function getDeviceMetadata()
     public function setDeviceMetadata($device_metadata)
     {
         if (is_null($device_metadata)) {
-            throw new \InvalidArgumentException('non-nullable device_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'device_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('device_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['device_metadata'] = $device_metadata;
 
@@ -728,7 +756,14 @@ public function getEndpointMetadata()
     public function setEndpointMetadata($endpoint_metadata)
     {
         if (is_null($endpoint_metadata)) {
-            throw new \InvalidArgumentException('non-nullable endpoint_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'endpoint_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('endpoint_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['endpoint_metadata'] = $endpoint_metadata;
 
@@ -782,7 +817,14 @@ public function getEventMetadata()
     public function setEventMetadata($event_metadata)
     {
         if (is_null($event_metadata)) {
-            throw new \InvalidArgumentException('non-nullable event_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'event_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('event_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['event_metadata'] = $event_metadata;
 
@@ -836,7 +878,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -944,7 +993,14 @@ public function getMetadata()
     public function setMetadata($metadata)
     {
         if (is_null($metadata)) {
-            throw new \InvalidArgumentException('non-nullable metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['metadata'] = $metadata;
 
@@ -998,7 +1054,14 @@ public function getSourceMetadata()
     public function setSourceMetadata($source_metadata)
     {
         if (is_null($source_metadata)) {
-            throw new \InvalidArgumentException('non-nullable source_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'source_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('source_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['source_metadata'] = $source_metadata;
 
diff --git a/src/Client/Model/ModelsEventResponse.php b/src/Client/Model/ModelsEventResponse.php
index a3fab09..d794982 100644
--- a/src/Client/Model/ModelsEventResponse.php
+++ b/src/Client/Model/ModelsEventResponse.php
@@ -118,22 +118,22 @@ class ModelsEventResponse implements ModelInterface, ArrayAccess, \JsonSerializa
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'acknowledged_at' => false,
+        'acknowledged_at' => true,
         'app_id' => false,
         'created_at' => false,
-        'data' => false,
-        'deleted_at' => false,
+        'data' => true,
+        'deleted_at' => true,
         'endpoint_metadata' => false,
         'endpoints' => false,
         'event_type' => false,
-        'headers' => false,
+        'headers' => true,
         'idempotency_key' => false,
         'is_duplicate_event' => false,
         'metadata' => false,
         'project_id' => false,
         'raw' => false,
         'source_id' => false,
-        'source_metadata' => false,
+        'source_metadata' => true,
         'status' => false,
         'uid' => false,
         'updated_at' => false,
@@ -450,7 +450,14 @@ public function getAcknowledgedAt()
     public function setAcknowledgedAt($acknowledged_at)
     {
         if (is_null($acknowledged_at)) {
-            throw new \InvalidArgumentException('non-nullable acknowledged_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'acknowledged_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('acknowledged_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['acknowledged_at'] = $acknowledged_at;
 
@@ -531,7 +538,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
@@ -558,7 +572,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -666,7 +687,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -855,7 +883,14 @@ public function getSourceMetadata()
     public function setSourceMetadata($source_metadata)
     {
         if (is_null($source_metadata)) {
-            throw new \InvalidArgumentException('non-nullable source_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'source_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('source_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['source_metadata'] = $source_metadata;
 
diff --git a/src/Client/Model/ModelsEventTypeResponse.php b/src/Client/Model/ModelsEventTypeResponse.php
index 66f18c3..5b28239 100644
--- a/src/Client/Model/ModelsEventTypeResponse.php
+++ b/src/Client/Model/ModelsEventTypeResponse.php
@@ -89,9 +89,9 @@ class ModelsEventTypeResponse implements ModelInterface, ArrayAccess, \JsonSeria
      */
     protected static array $openAPINullables = [
         'category' => false,
-        'deprecated_at' => false,
+        'deprecated_at' => true,
         'description' => false,
-        'json_schema' => false,
+        'json_schema' => true,
         'name' => false,
         'uid' => false
     ];
@@ -372,7 +372,14 @@ public function getDeprecatedAt()
     public function setDeprecatedAt($deprecated_at)
     {
         if (is_null($deprecated_at)) {
-            throw new \InvalidArgumentException('non-nullable deprecated_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deprecated_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deprecated_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deprecated_at'] = $deprecated_at;
 
@@ -426,7 +433,14 @@ public function getJsonSchema()
     public function setJsonSchema($json_schema)
     {
         if (is_null($json_schema)) {
-            throw new \InvalidArgumentException('non-nullable json_schema cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'json_schema');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('json_schema', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['json_schema'] = $json_schema;
 
diff --git a/src/Client/Model/ModelsFS.php b/src/Client/Model/ModelsFS.php
index 7894409..35d9922 100644
--- a/src/Client/Model/ModelsFS.php
+++ b/src/Client/Model/ModelsFS.php
@@ -84,10 +84,10 @@ class ModelsFS implements ModelInterface, ArrayAccess, \JsonSerializable
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
-        'headers' => false,
-        'path' => false,
-        'query' => false
+        'body' => true,
+        'headers' => true,
+        'path' => true,
+        'query' => true
     ];
 
     /**
@@ -331,7 +331,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -358,7 +365,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -385,7 +399,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -412,7 +433,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/src/Client/Model/ModelsFanoutEvent.php b/src/Client/Model/ModelsFanoutEvent.php
index 5370a79..844364c 100644
--- a/src/Client/Model/ModelsFanoutEvent.php
+++ b/src/Client/Model/ModelsFanoutEvent.php
@@ -86,8 +86,8 @@ class ModelsFanoutEvent implements ModelInterface, ArrayAccess, \JsonSerializabl
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'custom_headers' => false,
-        'data' => false,
+        'custom_headers' => true,
+        'data' => true,
         'event_type' => false,
         'idempotency_key' => false,
         'owner_id' => false
@@ -338,7 +338,14 @@ public function getCustomHeaders()
     public function setCustomHeaders($custom_headers)
     {
         if (is_null($custom_headers)) {
-            throw new \InvalidArgumentException('non-nullable custom_headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'custom_headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('custom_headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['custom_headers'] = $custom_headers;
 
@@ -365,7 +372,14 @@ public function getData()
     public function setData($data)
     {
         if (is_null($data)) {
-            throw new \InvalidArgumentException('non-nullable data cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'data');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('data', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['data'] = $data;
 
diff --git a/src/Client/Model/ModelsFilterResponse.php b/src/Client/Model/ModelsFilterResponse.php
index 3bd3d57..cc4acca 100644
--- a/src/Client/Model/ModelsFilterResponse.php
+++ b/src/Client/Model/ModelsFilterResponse.php
@@ -100,16 +100,16 @@ class ModelsFilterResponse implements ModelInterface, ArrayAccess, \JsonSerializ
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
-        'enabled_at' => false,
+        'body' => true,
+        'enabled_at' => true,
         'event_type' => false,
-        'headers' => false,
-        'path' => false,
-        'query' => false,
-        'raw_body' => false,
-        'raw_headers' => false,
-        'raw_path' => false,
-        'raw_query' => false,
+        'headers' => true,
+        'path' => true,
+        'query' => true,
+        'raw_body' => true,
+        'raw_headers' => true,
+        'raw_path' => true,
+        'raw_query' => true,
         'subscription_id' => false,
         'uid' => false
     ];
@@ -387,7 +387,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -414,7 +421,14 @@ public function getEnabledAt()
     public function setEnabledAt($enabled_at)
     {
         if (is_null($enabled_at)) {
-            throw new \InvalidArgumentException('non-nullable enabled_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'enabled_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('enabled_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['enabled_at'] = $enabled_at;
 
@@ -468,7 +482,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -495,7 +516,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -522,7 +550,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
@@ -549,7 +584,14 @@ public function getRawBody()
     public function setRawBody($raw_body)
     {
         if (is_null($raw_body)) {
-            throw new \InvalidArgumentException('non-nullable raw_body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'raw_body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('raw_body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['raw_body'] = $raw_body;
 
@@ -576,7 +618,14 @@ public function getRawHeaders()
     public function setRawHeaders($raw_headers)
     {
         if (is_null($raw_headers)) {
-            throw new \InvalidArgumentException('non-nullable raw_headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'raw_headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('raw_headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['raw_headers'] = $raw_headers;
 
@@ -603,7 +652,14 @@ public function getRawPath()
     public function setRawPath($raw_path)
     {
         if (is_null($raw_path)) {
-            throw new \InvalidArgumentException('non-nullable raw_path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'raw_path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('raw_path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['raw_path'] = $raw_path;
 
@@ -630,7 +686,14 @@ public function getRawQuery()
     public function setRawQuery($raw_query)
     {
         if (is_null($raw_query)) {
-            throw new \InvalidArgumentException('non-nullable raw_query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'raw_query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('raw_query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['raw_query'] = $raw_query;
 
diff --git a/src/Client/Model/ModelsFunctionRequest.php b/src/Client/Model/ModelsFunctionRequest.php
index 44813a6..068aaad 100644
--- a/src/Client/Model/ModelsFunctionRequest.php
+++ b/src/Client/Model/ModelsFunctionRequest.php
@@ -83,7 +83,7 @@ class ModelsFunctionRequest implements ModelInterface, ArrayAccess, \JsonSeriali
      */
     protected static array $openAPINullables = [
         'function' => false,
-        'payload' => false,
+        'payload' => true,
         'type' => false
     ];
 
@@ -351,7 +351,14 @@ public function getPayload()
     public function setPayload($payload)
     {
         if (is_null($payload)) {
-            throw new \InvalidArgumentException('non-nullable payload cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'payload');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('payload', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['payload'] = $payload;
 
diff --git a/src/Client/Model/ModelsMetaEventResponse.php b/src/Client/Model/ModelsMetaEventResponse.php
index 33ff7ba..2715d89 100644
--- a/src/Client/Model/ModelsMetaEventResponse.php
+++ b/src/Client/Model/ModelsMetaEventResponse.php
@@ -94,11 +94,11 @@ class ModelsMetaEventResponse implements ModelInterface, ArrayAccess, \JsonSeria
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'attempt' => false,
+        'attempt' => true,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'event_type' => false,
-        'metadata' => false,
+        'metadata' => true,
         'project_id' => false,
         'status' => false,
         'uid' => false,
@@ -366,7 +366,14 @@ public function getAttempt()
     public function setAttempt($attempt)
     {
         if (is_null($attempt)) {
-            throw new \InvalidArgumentException('non-nullable attempt cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'attempt');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('attempt', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['attempt'] = $attempt;
 
@@ -420,7 +427,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -474,7 +488,14 @@ public function getMetadata()
     public function setMetadata($metadata)
     {
         if (is_null($metadata)) {
-            throw new \InvalidArgumentException('non-nullable metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['metadata'] = $metadata;
 
diff --git a/src/Client/Model/ModelsProjectResponse.php b/src/Client/Model/ModelsProjectResponse.php
index f24f266..3137cec 100644
--- a/src/Client/Model/ModelsProjectResponse.php
+++ b/src/Client/Model/ModelsProjectResponse.php
@@ -98,14 +98,14 @@ class ModelsProjectResponse implements ModelInterface, ArrayAccess, \JsonSeriali
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'config' => false,
+        'config' => true,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'logo_url' => false,
         'name' => false,
         'organisation_id' => false,
         'retained_events' => false,
-        'statistics' => false,
+        'statistics' => true,
         'type' => false,
         'uid' => false,
         'updated_at' => false
@@ -380,7 +380,14 @@ public function getConfig()
     public function setConfig($config)
     {
         if (is_null($config)) {
-            throw new \InvalidArgumentException('non-nullable config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['config'] = $config;
 
@@ -434,7 +441,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -569,7 +583,14 @@ public function getStatistics()
     public function setStatistics($statistics)
     {
         if (is_null($statistics)) {
-            throw new \InvalidArgumentException('non-nullable statistics cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'statistics');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('statistics', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['statistics'] = $statistics;
 
diff --git a/src/Client/Model/ModelsSourceResponse.php b/src/Client/Model/ModelsSourceResponse.php
index 87268c8..94e3204 100644
--- a/src/Client/Model/ModelsSourceResponse.php
+++ b/src/Client/Model/ModelsSourceResponse.php
@@ -116,26 +116,26 @@ class ModelsSourceResponse implements ModelInterface, ArrayAccess, \JsonSerializ
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body_function' => false,
+        'body_function' => true,
         'created_at' => false,
         'custom_response' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'event_type_location' => false,
         'forward_headers' => false,
-        'header_function' => false,
+        'header_function' => true,
         'idempotency_keys' => false,
         'is_disabled' => false,
         'mask_id' => false,
         'name' => false,
         'project_id' => false,
         'provider' => false,
-        'provider_config' => false,
-        'pub_sub' => false,
+        'provider_config' => true,
+        'pub_sub' => true,
         'type' => false,
         'uid' => false,
         'updated_at' => false,
         'url' => false,
-        'verifier' => false
+        'verifier' => true
     ];
 
     /**
@@ -443,7 +443,14 @@ public function getBodyFunction()
     public function setBodyFunction($body_function)
     {
         if (is_null($body_function)) {
-            throw new \InvalidArgumentException('non-nullable body_function cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body_function');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body_function', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body_function'] = $body_function;
 
@@ -524,7 +531,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -605,7 +619,14 @@ public function getHeaderFunction()
     public function setHeaderFunction($header_function)
     {
         if (is_null($header_function)) {
-            throw new \InvalidArgumentException('non-nullable header_function cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'header_function');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('header_function', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['header_function'] = $header_function;
 
@@ -794,7 +815,14 @@ public function getProviderConfig()
     public function setProviderConfig($provider_config)
     {
         if (is_null($provider_config)) {
-            throw new \InvalidArgumentException('non-nullable provider_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'provider_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('provider_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['provider_config'] = $provider_config;
 
@@ -821,7 +849,14 @@ public function getPubSub()
     public function setPubSub($pub_sub)
     {
         if (is_null($pub_sub)) {
-            throw new \InvalidArgumentException('non-nullable pub_sub cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'pub_sub');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('pub_sub', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['pub_sub'] = $pub_sub;
 
@@ -956,7 +991,14 @@ public function getVerifier()
     public function setVerifier($verifier)
     {
         if (is_null($verifier)) {
-            throw new \InvalidArgumentException('non-nullable verifier cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'verifier');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('verifier', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['verifier'] = $verifier;
 
diff --git a/src/Client/Model/ModelsSubscriptionResponse.php b/src/Client/Model/ModelsSubscriptionResponse.php
index 4da8889..63cabf5 100644
--- a/src/Client/Model/ModelsSubscriptionResponse.php
+++ b/src/Client/Model/ModelsSubscriptionResponse.php
@@ -108,19 +108,19 @@ class ModelsSubscriptionResponse implements ModelInterface, ArrayAccess, \JsonSe
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'alert_config' => false,
+        'alert_config' => true,
         'created_at' => false,
-        'deleted_at' => false,
+        'deleted_at' => true,
         'delivery_mode' => false,
-        'device_metadata' => false,
-        'endpoint_metadata' => false,
-        'filter_config' => false,
-        'function' => false,
+        'device_metadata' => true,
+        'endpoint_metadata' => true,
+        'filter_config' => true,
+        'function' => true,
         'name' => false,
         'project_id' => false,
-        'rate_limit_config' => false,
-        'retry_config' => false,
-        'source_metadata' => false,
+        'rate_limit_config' => true,
+        'retry_config' => true,
+        'source_metadata' => true,
         'type' => false,
         'uid' => false,
         'updated_at' => false
@@ -415,7 +415,14 @@ public function getAlertConfig()
     public function setAlertConfig($alert_config)
     {
         if (is_null($alert_config)) {
-            throw new \InvalidArgumentException('non-nullable alert_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'alert_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('alert_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['alert_config'] = $alert_config;
 
@@ -469,7 +476,14 @@ public function getDeletedAt()
     public function setDeletedAt($deleted_at)
     {
         if (is_null($deleted_at)) {
-            throw new \InvalidArgumentException('non-nullable deleted_at cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'deleted_at');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('deleted_at', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['deleted_at'] = $deleted_at;
 
@@ -523,7 +537,14 @@ public function getDeviceMetadata()
     public function setDeviceMetadata($device_metadata)
     {
         if (is_null($device_metadata)) {
-            throw new \InvalidArgumentException('non-nullable device_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'device_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('device_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['device_metadata'] = $device_metadata;
 
@@ -550,7 +571,14 @@ public function getEndpointMetadata()
     public function setEndpointMetadata($endpoint_metadata)
     {
         if (is_null($endpoint_metadata)) {
-            throw new \InvalidArgumentException('non-nullable endpoint_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'endpoint_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('endpoint_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['endpoint_metadata'] = $endpoint_metadata;
 
@@ -577,7 +605,14 @@ public function getFilterConfig()
     public function setFilterConfig($filter_config)
     {
         if (is_null($filter_config)) {
-            throw new \InvalidArgumentException('non-nullable filter_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'filter_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('filter_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['filter_config'] = $filter_config;
 
@@ -604,7 +639,14 @@ public function getFunction()
     public function setFunction($function)
     {
         if (is_null($function)) {
-            throw new \InvalidArgumentException('non-nullable function cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'function');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('function', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['function'] = $function;
 
@@ -685,7 +727,14 @@ public function getRateLimitConfig()
     public function setRateLimitConfig($rate_limit_config)
     {
         if (is_null($rate_limit_config)) {
-            throw new \InvalidArgumentException('non-nullable rate_limit_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'rate_limit_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('rate_limit_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['rate_limit_config'] = $rate_limit_config;
 
@@ -712,7 +761,14 @@ public function getRetryConfig()
     public function setRetryConfig($retry_config)
     {
         if (is_null($retry_config)) {
-            throw new \InvalidArgumentException('non-nullable retry_config cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'retry_config');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('retry_config', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['retry_config'] = $retry_config;
 
@@ -739,7 +795,14 @@ public function getSourceMetadata()
     public function setSourceMetadata($source_metadata)
     {
         if (is_null($source_metadata)) {
-            throw new \InvalidArgumentException('non-nullable source_metadata cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'source_metadata');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('source_metadata', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['source_metadata'] = $source_metadata;
 
diff --git a/src/Client/Model/ModelsTestFilterRequestScopes.php b/src/Client/Model/ModelsTestFilterRequestScopes.php
index 328a4ad..1b07937 100644
--- a/src/Client/Model/ModelsTestFilterRequestScopes.php
+++ b/src/Client/Model/ModelsTestFilterRequestScopes.php
@@ -87,10 +87,10 @@ class ModelsTestFilterRequestScopes implements ModelInterface, ArrayAccess, \Jso
      */
     protected static array $openAPINullables = [
         'body' => true,
-        'header' => false,
-        'headers' => false,
-        'path' => false,
-        'query' => false
+        'header' => true,
+        'headers' => true,
+        'path' => true,
+        'query' => true
     ];
 
     /**
@@ -372,7 +372,14 @@ public function getHeader()
     public function setHeader($header)
     {
         if (is_null($header)) {
-            throw new \InvalidArgumentException('non-nullable header cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'header');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('header', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['header'] = $header;
 
@@ -399,7 +406,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -426,7 +440,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -453,7 +474,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/src/Client/Model/ModelsUpdateEventType.php b/src/Client/Model/ModelsUpdateEventType.php
index d4bbc25..26f5a44 100644
--- a/src/Client/Model/ModelsUpdateEventType.php
+++ b/src/Client/Model/ModelsUpdateEventType.php
@@ -84,7 +84,7 @@ class ModelsUpdateEventType implements ModelInterface, ArrayAccess, \JsonSeriali
     protected static array $openAPINullables = [
         'category' => false,
         'description' => false,
-        'json_schema' => false
+        'json_schema' => true
     ];
 
     /**
@@ -378,7 +378,14 @@ public function getJsonSchema()
     public function setJsonSchema($json_schema)
     {
         if (is_null($json_schema)) {
-            throw new \InvalidArgumentException('non-nullable json_schema cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'json_schema');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('json_schema', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['json_schema'] = $json_schema;
 
diff --git a/src/Client/Model/ModelsUpdateFilterRequest.php b/src/Client/Model/ModelsUpdateFilterRequest.php
index dec4538..4986110 100644
--- a/src/Client/Model/ModelsUpdateFilterRequest.php
+++ b/src/Client/Model/ModelsUpdateFilterRequest.php
@@ -90,13 +90,13 @@ class ModelsUpdateFilterRequest implements ModelInterface, ArrayAccess, \JsonSer
      * @var boolean[]
      */
     protected static array $openAPINullables = [
-        'body' => false,
+        'body' => true,
         'enabled_at' => false,
         'event_type' => false,
-        'headers' => false,
+        'headers' => true,
         'is_flattened' => false,
-        'path' => false,
-        'query' => false
+        'path' => true,
+        'query' => true
     ];
 
     /**
@@ -352,7 +352,14 @@ public function getBody()
     public function setBody($body)
     {
         if (is_null($body)) {
-            throw new \InvalidArgumentException('non-nullable body cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'body');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('body', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['body'] = $body;
 
@@ -433,7 +440,14 @@ public function getHeaders()
     public function setHeaders($headers)
     {
         if (is_null($headers)) {
-            throw new \InvalidArgumentException('non-nullable headers cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'headers');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('headers', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['headers'] = $headers;
 
@@ -487,7 +501,14 @@ public function getPath()
     public function setPath($path)
     {
         if (is_null($path)) {
-            throw new \InvalidArgumentException('non-nullable path cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'path');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('path', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['path'] = $path;
 
@@ -514,7 +535,14 @@ public function getQuery()
     public function setQuery($query)
     {
         if (is_null($query)) {
-            throw new \InvalidArgumentException('non-nullable query cannot be null');
+            array_push($this->openAPINullablesSetToNull, 'query');
+        } else {
+            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
+            $index = array_search('query', $nullablesSetToNull);
+            if ($index !== FALSE) {
+                unset($nullablesSetToNull[$index]);
+                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
+            }
         }
         $this->container['query'] = $query;
 
diff --git a/tests/ApiClientContractTest.php b/tests/ApiClientContractTest.php
index 8e4a1af..9a080c9 100644
--- a/tests/ApiClientContractTest.php
+++ b/tests/ApiClientContractTest.php
@@ -25,8 +25,8 @@
 
     $config = (new Configuration())
         ->setHost('https://us.getconvoy.cloud/api')
-        ->setApiKeyPrefix('Authorization', 'Bearer')
-        ->setApiKey('Authorization', 'test-key');
+        // spec now models auth as http bearer; the client adds the Bearer prefix
+        ->setAccessToken('test-key');
 
     $event = (new ModelsCreateEvent())
         ->setEndpointId('ep-1')