message: Add pip package name to error message.
diff: @@ -154,7 +154,8 @@ class Client(object):
  return self._service
  if not _GOOGLE_API_CLIENT_INSTALLED:
  - raise RuntimeError('Missing runtime dependency on the Google API client.')
  + raise RuntimeError('Missing runtime dependency on the Google API client. '
  + 'Run `pip install cloud-tpu-client` to fix.')
  credentials = self._credentials
  if credentials is None or credentials == 'default':
  