code: async def unban(self, user_id: base.Integer):
          
          return await self.bot.unban_chat_member(self.id, user_id=user_id)
docs: Use this method to unban a previously kicked user in a supergroup or channel. `
          The user will not return to the group or channel automatically, but will be able to join via link, etc.
  
          The bot must be an administrator for this to work.
  
          Source: https://core.telegram.org/bots/api#unbanchatmember
  
          :param user_id: Unique identifier of the target user
          :type user_id: :obj:`base.Integer`
          :return: Returns True on success.
          :rtype: :obj:`base.Boolean`