public function getAllRequestsToExcel()
{
$requests = \App\Request::select('id', 'first_name', 'last_name', 'description', 'created_at')->get();
Excel::create('requests', function ($excel) use($requests) {
$excel->sheet('Sheet 1', function ($sheet) use($requests) {
$sheet->fromArray($requests);
});
})->export('xls');
}