Fix for pubsub scope error.

Author: daspecster

pubsub/google/cloud/pubsub/client.py

@@ -16,6 +16,7 @@
 
 import os
 
+import google.auth.credentials
 from google.cloud.client import JSONClient
 from google.cloud.environment_vars import DISABLE_GRPC
 from google.cloud.pubsub._http import Connection
@@ -42,6 +43,9 @@
 _DISABLE_GAX = os.getenv(DISABLE_GRPC, False)
 _USE_GAX = _HAVE_GAX and not _DISABLE_GAX
 
+_SCOPES = ('https://www.googleapis.com/auth/pubsub',
+           'https://www.googleapis.com/auth/cloud-platform')
+
 
 class Client(JSONClient):
     """Client to bundle configuration needed for API requests.
@@ -79,6 +83,8 @@ def __init__(self, project=None, credentials=None,
                  http=None, use_gax=None):
         super(Client, self).__init__(
             project=project, credentials=credentials, http=http)
+        self._credentials = google.auth.credentials.with_scopes_if_required(
+            self._credentials, _SCOPES)
         self._connection = Connection(
             credentials=self._credentials, http=self._http)
         if use_gax is None: