CKFinder Authentication issue with laravel 5

I'm using Laravel 5. I have folder that references ckfinder in /public/plugins/ckfinder directory.

CheckAuthentication function in config.php is I need to use but session value and Auth Class is null.

I have tried

function CheckAuthentication(){
    return Auth::check();
}

or

 //Ckfinder Config.php
function CheckAuthentication(){
        if($_SESSION['ckfinder_enabled'] == 'enabled') {
            return true;
        } else {
            return false;
        }
    }

        //App\Http\Middleware\Authenticate.php
    public function handle($request, Closure $next)
            {
                if ($this->auth->guest()){
                        if ($request->ajax()){
                            return response('Unauthorized.', 401);
                        }else{
                            return redirect()->guest('auth/login');
                        }
                    }

                if($this->auth->check()) {
                     $_SESSION['ckfinder_enabled'] = 'enabled';
                    return $next($request);
                }
            }

I had the same issue too. Your code is useful for laravel 4.2 but for laravel 5 you need to do this in ckfinder folder's config.php:

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

$app->make('Illuminate\Contracts\Http\Kernel')
  ->handle(Illuminate\Http\Request::capture());

Then you are ready to go with this code:

function CheckAuthentication(){
    return Auth::check();
}

This should work.