who to use laravel authentication for other php application ?

hello .

how to use laravel 5.3 authentication for other php application ? i want use laravel 5.3 authentication to CkFinder File manager Or Other web Application !

this code not work :

 require __DIR__.'/../../../bootstrap/autoload.php';
$app = require_once __DIR__.'/../../../bootstrap/app.php';

$app->make('Illuminate\Contracts\Http\Kernel')
    ->handle(Illuminate\Http\Request::capture());
$isAuthorized = Auth::check();
return $isAuthorized;