diff --git a/config/packages/security.yaml b/config/packages/security.yaml
index 0ecece0..bece817 100644
--- a/config/packages/security.yaml
+++ b/config/packages/security.yaml
@@ -14,8 +14,11 @@ security:
         dev:
             pattern: ^/(_(profiler|wdt)|css|images|js)/
             security: false
+
         main:
             anonymous: ~
+            pattern: ^/
+            user_checker: App\Security\UserChecker
             guard:
                 authenticators:
                     - App\Security\LoginFormAuthentificatorAuthenticator
diff --git a/src/Security/UserChecker.php b/src/Security/UserChecker.php
new file mode 100644
index 0000000..a146b9a
--- /dev/null
+++ b/src/Security/UserChecker.php
@@ -0,0 +1,36 @@
+<?php
+namespace App\Security;
+
+use App\Exception\AccountDeletedException;
+use App\Security\User as AppUser;
+use Symfony\Component\Security\Core\Exception\AccountExpiredException;
+use Symfony\Component\Security\Core\Exception\CustomUserMessageAuthenticationException;
+use Symfony\Component\Security\Core\User\UserCheckerInterface;
+use Symfony\Component\Security\Core\User\UserInterface;
+
+class UserChecker implements UserCheckerInterface
+{
+    public function checkPreAuth(UserInterface $user)
+    {
+        if (!$user instanceof AppUser) {
+            return;
+        }
+
+        // user is not activated
+        if ($user-> getActive() === false) {
+            throw new AccountDeletedException();
+        }
+    }
+
+    public function checkPostAuth(UserInterface $user)
+    {
+        if (!$user instanceof AppUser) {
+            return;
+        }
+
+        // user is not activated
+        if ($user->getActive()  === false) {
+            throw new AccountDeletedException();
+        }
+    }
+}
\ No newline at end of file