diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index 71b4528bc8..5c692d0701 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -34514,7 +34514,6 @@ components:
       - id
       - type
       - inputs
-      - auth
       - customer_id
       type: object
     ObservabilityPipelineGoogleChronicleDestinationEncoding:
@@ -34580,9 +34579,7 @@ components:
       - type
       - inputs
       - bucket
-      - auth
       - storage_class
-      - acl
       type: object
     ObservabilityPipelineGoogleCloudStorageDestinationAcl:
       description: Access control list setting for objects written to the bucket.
@@ -34713,7 +34710,6 @@ components:
       required:
       - id
       - type
-      - auth
       - decoding
       - project
       - subscription
diff --git a/src/datadog_api_client/v2/model/observability_pipeline_config_destination_item.py b/src/datadog_api_client/v2/model/observability_pipeline_config_destination_item.py
index ad7cdf4a89..df018bec4e 100644
--- a/src/datadog_api_client/v2/model/observability_pipeline_config_destination_item.py
+++ b/src/datadog_api_client/v2/model/observability_pipeline_config_destination_item.py
@@ -44,7 +44,7 @@ def __init__(self, **kwargs):
         :type tls: ObservabilityPipelineTls, optional
 
         :param acl: Access control list setting for objects written to the bucket.
-        :type acl: ObservabilityPipelineGoogleCloudStorageDestinationAcl
+        :type acl: ObservabilityPipelineGoogleCloudStorageDestinationAcl, optional
 
         :param metadata: Custom metadata to attach to each object uploaded to the GCS bucket.
         :type metadata: [ObservabilityPipelineMetadataEntry], optional
diff --git a/src/datadog_api_client/v2/model/observability_pipeline_google_chronicle_destination.py b/src/datadog_api_client/v2/model/observability_pipeline_google_chronicle_destination.py
index cdfbc1b816..964a09e959 100644
--- a/src/datadog_api_client/v2/model/observability_pipeline_google_chronicle_destination.py
+++ b/src/datadog_api_client/v2/model/observability_pipeline_google_chronicle_destination.py
@@ -56,11 +56,11 @@ def openapi_types(_):
 
     def __init__(
         self_,
-        auth: ObservabilityPipelineGcpAuth,
         customer_id: str,
         id: str,
         inputs: List[str],
         type: ObservabilityPipelineGoogleChronicleDestinationType,
+        auth: Union[ObservabilityPipelineGcpAuth, UnsetType] = unset,
         encoding: Union[ObservabilityPipelineGoogleChronicleDestinationEncoding, UnsetType] = unset,
         log_type: Union[str, UnsetType] = unset,
         **kwargs,
@@ -69,7 +69,7 @@ def __init__(
         The ``google_chronicle`` destination sends logs to Google Chronicle.
 
         :param auth: GCP credentials used to authenticate with Google Cloud Storage.
-        :type auth: ObservabilityPipelineGcpAuth
+        :type auth: ObservabilityPipelineGcpAuth, optional
 
         :param customer_id: The Google Chronicle customer ID.
         :type customer_id: str
@@ -89,13 +89,14 @@ def __init__(
         :param type: The destination type. The value should always be ``google_chronicle``.
         :type type: ObservabilityPipelineGoogleChronicleDestinationType
         """
+        if auth is not unset:
+            kwargs["auth"] = auth
         if encoding is not unset:
             kwargs["encoding"] = encoding
         if log_type is not unset:
             kwargs["log_type"] = log_type
         super().__init__(kwargs)
 
-        self_.auth = auth
         self_.customer_id = customer_id
         self_.id = id
         self_.inputs = inputs
diff --git a/src/datadog_api_client/v2/model/observability_pipeline_google_cloud_storage_destination.py b/src/datadog_api_client/v2/model/observability_pipeline_google_cloud_storage_destination.py
index baf750038b..a2e8b0c337 100644
--- a/src/datadog_api_client/v2/model/observability_pipeline_google_cloud_storage_destination.py
+++ b/src/datadog_api_client/v2/model/observability_pipeline_google_cloud_storage_destination.py
@@ -68,13 +68,13 @@ def openapi_types(_):
 
     def __init__(
         self_,
-        acl: ObservabilityPipelineGoogleCloudStorageDestinationAcl,
-        auth: ObservabilityPipelineGcpAuth,
         bucket: str,
         id: str,
         inputs: List[str],
         storage_class: ObservabilityPipelineGoogleCloudStorageDestinationStorageClass,
         type: ObservabilityPipelineGoogleCloudStorageDestinationType,
+        acl: Union[ObservabilityPipelineGoogleCloudStorageDestinationAcl, UnsetType] = unset,
+        auth: Union[ObservabilityPipelineGcpAuth, UnsetType] = unset,
         key_prefix: Union[str, UnsetType] = unset,
         metadata: Union[List[ObservabilityPipelineMetadataEntry], UnsetType] = unset,
         **kwargs,
@@ -84,10 +84,10 @@ def __init__(
         It requires a bucket name, GCP authentication, and metadata fields.
 
         :param acl: Access control list setting for objects written to the bucket.
-        :type acl: ObservabilityPipelineGoogleCloudStorageDestinationAcl
+        :type acl: ObservabilityPipelineGoogleCloudStorageDestinationAcl, optional
 
         :param auth: GCP credentials used to authenticate with Google Cloud Storage.
-        :type auth: ObservabilityPipelineGcpAuth
+        :type auth: ObservabilityPipelineGcpAuth, optional
 
         :param bucket: Name of the GCS bucket.
         :type bucket: str
@@ -110,14 +110,16 @@ def __init__(
         :param type: The destination type. Always ``google_cloud_storage``.
         :type type: ObservabilityPipelineGoogleCloudStorageDestinationType
         """
+        if acl is not unset:
+            kwargs["acl"] = acl
+        if auth is not unset:
+            kwargs["auth"] = auth
         if key_prefix is not unset:
             kwargs["key_prefix"] = key_prefix
         if metadata is not unset:
             kwargs["metadata"] = metadata
         super().__init__(kwargs)
 
-        self_.acl = acl
-        self_.auth = auth
         self_.bucket = bucket
         self_.id = id
         self_.inputs = inputs
diff --git a/src/datadog_api_client/v2/model/observability_pipeline_google_pub_sub_source.py b/src/datadog_api_client/v2/model/observability_pipeline_google_pub_sub_source.py
index 4cb4395cda..6135892ad0 100644
--- a/src/datadog_api_client/v2/model/observability_pipeline_google_pub_sub_source.py
+++ b/src/datadog_api_client/v2/model/observability_pipeline_google_pub_sub_source.py
@@ -54,12 +54,12 @@ def openapi_types(_):
 
     def __init__(
         self_,
-        auth: ObservabilityPipelineGcpAuth,
         decoding: ObservabilityPipelineDecoding,
         id: str,
         project: str,
         subscription: str,
         type: ObservabilityPipelineGooglePubSubSourceType,
+        auth: Union[ObservabilityPipelineGcpAuth, UnsetType] = unset,
         tls: Union[ObservabilityPipelineTls, UnsetType] = unset,
         **kwargs,
     ):
@@ -67,7 +67,7 @@ def __init__(
         The ``google_pubsub`` source ingests logs from a Google Cloud Pub/Sub subscription.
 
         :param auth: GCP credentials used to authenticate with Google Cloud Storage.
-        :type auth: ObservabilityPipelineGcpAuth
+        :type auth: ObservabilityPipelineGcpAuth, optional
 
         :param decoding: The decoding format used to interpret incoming logs.
         :type decoding: ObservabilityPipelineDecoding
@@ -87,11 +87,12 @@ def __init__(
         :param type: The source type. The value should always be ``google_pubsub``.
         :type type: ObservabilityPipelineGooglePubSubSourceType
         """
+        if auth is not unset:
+            kwargs["auth"] = auth
         if tls is not unset:
             kwargs["tls"] = tls
         super().__init__(kwargs)
 
-        self_.auth = auth
         self_.decoding = decoding
         self_.id = id
         self_.project = project