fix code quality, typage, php-csfixer

src/Entity/User.php

@@ -6,7 +6,7 @@ use Symfony\Component\Security\Core\User\UserInterface;
 
 class User implements UserInterface
 {
-    protected array $attributes = [];
+    private array $attributes = [];
     private string $login;
     private string $password;
     private bool $rememberMe;