code: def format(self, member_info: bool = False):
          
          user = self.api_object
          self.__format_user(user)
          if member_info and self.chat.type != CHAT_TYPE_PRIVATE:
              self._add_empty()
              self.__format_member(user)
docs: :param member_info: If True, adds also chat member info. Please, note that this additional info requires
              to make ONE api call.