fix: pass updated keyword args to Publisher/Subscriber client in goog…

…le/pubsub #161 (#164)

…le/pubsub

---------

Co-authored-by: David Ankin <daveankin@gmail.com>

modules/google/testcontainers/google/pubsub.py

@@ -56,7 +56,15 @@ 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"] = {"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"] = {"api_endpoint": self.get_pubsub_emulator_host()}
+        kwargs["credentials"] = credentials.AnonymousCredentials()
         return self._get_client(pubsub.SubscriberClient, **kwargs)