Pagekit\User\Controller\AuthController::loginAction PHP Method

    public function loginAction($redirect = '')
    {
        if (!$redirect) {
            $redirect = App::url(App::config('system/user')['login_redirect']);
        }
        if (App::user()->isAuthenticated()) {
            return App::redirect($redirect);
        }
        return ['$view' => ['title' => __('Login'), 'name' => 'system/user/login.php'], 'last_username' => App::session()->get(Auth::LAST_USERNAME), 'redirect' => $redirect];
    }