def unban_chat_member(self, user_id):
        """
        Use this method to unban a previously kicked user in a supergroup.
        The bot must be an administrator in the group for this to work.

        :param int user_id: Unique identifier of the target user
        """
        return self.bot.api_call("unbanChatMember", chat_id=self.id, user_id=user_id)
Use this method to unban a previously kicked user in a supergroup.
        The bot must be an administrator in the group for this to work.

        :param int user_id: Unique identifier of the target user