function ban(int $days = 0, string $reason = '') {
        return $this->guild->ban($this, $days, $reason);
    }
function ban(int $days = 0, string $reason = '') {
        return $this->guild->ban($this, $days, $reason);
    }
function ban ( int $ days = 0 , string $ reason = '' ) { return $ this -> guild -> ban ( $ this , $ days , $ reason ) ; }
Bans the guild member.
@param int     $days     Number of days of messages to delete (0-7).
@param string  $reason
@return \React\Promise\ExtendedPromiseInterface
Bans the guild member .