How to check "isAuthenticated()" about laravel-saml2 HOT 2 OPEN

/**
 * Handle the event.
 *
 * @param SignedIn $event
 * @return void
 */
public function handle(SignedIn $event)
{
    try {
        $samlUser = $event->user;

        if ($event->auth->isAuthenticated()) {
            Logger::sso()->info('User is authenticated with attributes: ', $samlUser->getAttributes());

        } else {
            Logger::sso()->info('User is not authenticated.');
            Logger::sso()->error('Last error : ' . $event->auth->getLastErrorReason());
        }

        $user = new SsoUser();
        $user->setSsoAttributes($samlUser->getAttributes());

        if ($bsUser = $user->getUser()) {
            Auth::login($bsUser);

            if (Auth::check()) {
                Logger::sso()->info($bsUser->email . ' signed-in successfully via sso.');
             
            }
        } else {
            Logger::sso()->error('User Not Found.');
        }

    } catch (\Exception $exception) {
        Logger::sso()->error(__METHOD__ . ' Exception: ' . $exception->getMessage());
    }

}

public function failed(SignedIn $event, $exception)
{
    Logger::sso()->error('SignedIn listener failed. Error: ' . $exception->getMessage());
}