sspanel/app/Middleware/Guest.php

<?php

namespace App\Middleware;

use App\Services\Auth as AuthService;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;

class Guest
{

    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next)
    {
        $user = AuthService::getUser();
        if ($user->isLogin) {
            $newResponse = $response->withStatus(302)->withHeader('Location', '/user');
            return $newResponse;
        }
        $response = $next($request, $response);
        return $response;
    }
}