docs: def terminate(self):
          """
          Terminate the Service execution.
  
          .. versionadded:: 1.13
  
          :return: None if the termination request was successful
          :raises APIError: When the service execution could not be terminated.
          """
          url = self._client._build_url('service_execution_terminate', service_execution_id=self.id)
          response = self._client._request('GET', url, params=dict(format='json'))
  
          if response.status_code != requests.codes.accepted:  # pragma: no cover
              raise APIError("Could not execute service '{}': {}".format(self, response))