use Illuminate\Auth\AuthenticationException;
use Illuminate\Support\Arr;

protected function unauthenticated($request, AuthenticationException $exception)
{
    if ($request->expectsJson()) {
        return response()->json(['message' => $exception->getMessage()], 401);
    }

    $guard = Arr::get($exception->guards(), 0);
    switch ($guard) {
        case 'admin':
            $login = 'admin.login';
            break;
        default:
            $login = 'login';
            break;
    }

    return redirect()->guest(route($login));
}