code: def onPeopleAdded(
          self,
          mid=None,
          added_ids=None,
          author_id=None,
          thread_id=None,
          ts=None,
          msg=None,
      ):
          
          log.info(
              "{} added: {} in {}".format(author_id, ", ".join(added_ids), thread_id)
          )
docs: Called when the client is listening, and somebody adds people to a group thread
  
          :param mid: The action ID
          :param added_ids: The IDs of the people who got added
          :param author_id: The ID of the person who added the people
          :param thread_id: Thread ID that the action was sent to. See :ref:`intro_threads`
          :param ts: A timestamp of the action
          :param msg: A full set of the data recieved