code: async def unban(self, user, *, reason=None):
          
          await self._state.http.unban(user.id, self.id, reason=reason)
docs: |coro|
  
          Unbans a user from the guild.
  
          The user must meet the :class:`abc.Snowflake` abc.
  
          You must have the :attr:`~Permissions.ban_members` permission to
          do this.
  
          Parameters
          -----------
          user: :class:`abc.Snowflake`
              The user to unban.
          reason: Optional[:class:`str`]
              The reason for doing this action. Shows up on the audit log.
  
          Raises
          -------
          Forbidden
              You do not have the proper permissions to unban.
          HTTPException
              Unbanning failed.