Cartalyst\Sentinel\Sentinel::guest PHP Метод

    public function guest()
    {
        return !$this->check();
    }

 /**
  * Handle an incoming request.
  *
  * @param  \Illuminate\Http\Request  $request
  * @param  \Closure  $next
  * @return mixed
  */
 public function handle($request, Closure $next)
 {
     if ($this->auth->guest()) {
         if ($request->ajax()) {
             return response('Unauthorized.', 401);
         } else {
             app('alerts')->error(trans('message.not_logged_in'));
             return redirect()->guest('login');
         }
     }
     return $next($request);
 }