fix: pass updated keyword args to Publisher/Subscriber client in google/pubsub

Author: Mohsin-Ul-Islam

modules/google/testcontainers/google/pubsub.py

@@ -56,7 +56,13 @@ def _get_client(self, cls: type, **kwargs) -> dict:
             return cls(**kwargs)
 
     def get_publisher_client(self, **kwargs) -> pubsub.PublisherClient:
+        from google.auth import credentials
+        kwargs['client_options'] = dict(api_endpoint=self.get_pubsub_emulator_host())
+        kwargs['credentials'] = credentials.AnonymousCredentials()
         return self._get_client(pubsub.PublisherClient, **kwargs)
 
     def get_subscriber_client(self, **kwargs) -> pubsub.SubscriberClient:
+        from google.auth import credentials
+        kwargs['client_options'] = dict(api_endpoint=self.get_pubsub_emulator_host())
+        kwargs['credentials'] = credentials.AnonymousCredentials()
         return self._get_client(pubsub.SubscriberClient, **kwargs)