code: def get_chat_member(self, chat_id, user_id):
          
          result = apihelper.get_chat_member(self.token, chat_id, user_id)
          return types.ChatMember.de_json(result)
docs: Use this method to get information about a member of a chat. Returns a ChatMember object on success.
          :param chat_id:
          :param user_id:
          :return: