code: def _get_uaa_uri(self):
          
          if 'VCAP_SERVICES' in os.environ:
              services = json.loads(os.getenv('VCAP_SERVICES'))
              predix_uaa = services['predix-uaa'][0]['credentials']
              return predix_uaa['uri']
          else:
              return predix.config.get_env_value(self, 'uri')
docs: Returns the URI endpoint for an instance of a UAA
          service instance from environment inspection.