diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..49dbaea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/vendor/
+/.idea/
+/composer.lock
diff --git a/Controller/KeycloakController.php b/Controller/KeycloakController.php
index 478d332..9842c26 100644
--- a/Controller/KeycloakController.php
+++ b/Controller/KeycloakController.php
@@ -9,12 +9,12 @@
 
 class KeycloakController extends AbstractController
 {
-    public function connect(ClientRegistry $clientRegistry)
+    public function connect(ClientRegistry $clientRegistry): RedirectResponse
     {
         return $clientRegistry->getClient('keycloak')->redirect();
     }
 
-    public function connectCheck(Request $request, string $defaultTargetRouteName)
+    public function connectCheck(Request $request, string $defaultTargetRouteName): RedirectResponse
     {
         $loginReferrer = null;
         if ($request->hasSession()) {
@@ -24,12 +24,12 @@ public function connectCheck(Request $request, string $defaultTargetRouteName)
         return $loginReferrer ? $this->redirect($loginReferrer) : $this->redirectToRoute($defaultTargetRouteName);
     }
 
-    public function logout(Request $request, string $defaultTargetRouteName)
+    public function logout(Request $request, string $defaultTargetRouteName): RedirectResponse
     {
         return new RedirectResponse($this->generateUrl($defaultTargetRouteName));
     }
 
-    public function account(ClientRegistry $clientRegistry)
+    public function account(ClientRegistry $clientRegistry): RedirectResponse
     {
         return $this->redirect($clientRegistry->getClient('keycloak')->getOAuth2Provider()->getResourceOwnerManageAccountUrl());
     }
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index c8d0643..0b3691c 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -7,7 +7,7 @@
 
 class Configuration implements ConfigurationInterface
 {
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder('idci_keycloak_security');
 
diff --git a/DependencyInjection/IDCIKeycloakSecurityExtension.php b/DependencyInjection/IDCIKeycloakSecurityExtension.php
index 406c578..065e328 100644
--- a/DependencyInjection/IDCIKeycloakSecurityExtension.php
+++ b/DependencyInjection/IDCIKeycloakSecurityExtension.php
@@ -10,7 +10,7 @@
 
 class IDCIKeycloakSecurityExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
@@ -23,7 +23,7 @@ public function load(array $configs, ContainerBuilder $container)
         $container->setParameter('idci_keycloak_security.ssl_verification', $config['ssl_verification']);
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         $bundles = $container->getParameter('kernel.bundles');
 
@@ -37,7 +37,7 @@ public function prepend(ContainerBuilder $container)
         $container->prependExtensionConfig('knpu_oauth2_client', $this->generateKeycloakAuthConfiguration($config));
     }
 
-    protected function generateKeycloakAuthConfiguration(array $config)
+    protected function generateKeycloakAuthConfiguration(array $config): array
     {
         return [
             'clients' => [
diff --git a/EventListener/ExceptionListener.php b/EventListener/ExceptionListener.php
index baeced2..f3769f2 100644
--- a/EventListener/ExceptionListener.php
+++ b/EventListener/ExceptionListener.php
@@ -12,14 +12,14 @@ class ExceptionListener
     /**
      * @var UrlGeneratorInterface
      */
-    private $urlGenerator;
+    private UrlGeneratorInterface $urlGenerator;
 
     public function __construct(UrlGeneratorInterface $urlGenerator)
     {
         $this->urlGenerator = $urlGenerator;
     }
 
-    public function onKernelException(ExceptionEvent $event)
+    public function onKernelException(ExceptionEvent $event): void
     {
         $exception = $event->getThrowable();
 
diff --git a/EventListener/LogoutListener.php b/EventListener/LogoutListener.php
index b1d1416..17cd17c 100644
--- a/EventListener/LogoutListener.php
+++ b/EventListener/LogoutListener.php
@@ -35,9 +35,9 @@ public function __construct(
         $this->defaultTargetRouteName = $defaultTargetRouteName;
     }
 
-    public function onSymfonyComponentSecurityHttpEventLogoutEvent(LogoutEvent $event)
+    public function onSymfonyComponentSecurityHttpEventLogoutEvent(LogoutEvent $event): void
     {
-        if (null === $event->getToken() || null === $event->getToken()->getUser()) {
+        if (null === $event->getToken()?->getUser()) {
             return;
         }
 
diff --git a/IDCIKeycloakSecurityBundle.php b/IDCIKeycloakSecurityBundle.php
index b73a856..074b963 100644
--- a/IDCIKeycloakSecurityBundle.php
+++ b/IDCIKeycloakSecurityBundle.php
@@ -12,7 +12,7 @@ class IDCIKeycloakSecurityBundle extends Bundle
     /**
      * @return void
      */
-    public function build(ContainerBuilder $container)
+    public function build(ContainerBuilder $container): void
     {
         parent::build($container);
     }
diff --git a/Provider/KeycloakProvider.php b/Provider/KeycloakProvider.php
index 6b43390..05223e3 100644
--- a/Provider/KeycloakProvider.php
+++ b/Provider/KeycloakProvider.php
@@ -20,12 +20,12 @@ class KeycloakProvider extends AbstractProvider
     /**
      * @var string use to identify the "public"" way to call the auth server
      */
-    const MODE_PUBLIC = 'public';
+    private const MODE_PUBLIC = 'public';
 
     /**
      * @var string use to identify the "private"" way to call the auth server
      */
-    const MODE_PRIVATE = 'private';
+    private const MODE_PRIVATE = 'private';
 
     public ?string $authServerPublicUrl = null;
 
@@ -58,17 +58,17 @@ public function decryptResponse($response): array
      *
      * @return string
      */
-    public function getBaseUrl($mode = self::MODE_PUBLIC)
+    public function getBaseUrl(string $mode = self::MODE_PUBLIC): ?string
     {
         return self::MODE_PRIVATE === $mode ? $this->authServerPrivateUrl : $this->authServerPublicUrl;
     }
 
-    public function getBaseUrlWithRealm($mode)
+    public function getBaseUrlWithRealm($mode): string
     {
         return sprintf('%s/realms/%s', $this->getBaseUrl($mode), $this->realm);
     }
 
-    public function getResourceOwnerManageAccountUrl()
+    public function getResourceOwnerManageAccountUrl(): string
     {
         return sprintf('%s/account', $this->getBaseUrlWithRealm(self::MODE_PUBLIC));
     }
@@ -103,7 +103,7 @@ public function getBaseApiUrlWithRealm(): string
         return sprintf('%s/admin/realms/%s', $this->getBaseUrl(self::MODE_PRIVATE), $this->realm);
     }
 
-    public function getLogoutUrl(array $options = [])
+    public function getLogoutUrl(array $options = []): string
     {
         $base = $this->getBaseLogoutUrl();
         $params = $this->getAuthorizationParameters($options);
@@ -128,12 +128,12 @@ public function getResourceOwner(AccessToken $token): KeycloakResourceOwner
         return $this->createResourceOwner($response, $token);
     }
 
-    public function getClientId()
+    public function getClientId(): string
     {
         return $this->clientId;
     }
 
-    public function getClientSecret()
+    public function getClientSecret(): string
     {
         return $this->clientSecret;
     }
@@ -148,7 +148,7 @@ protected function getScopeSeparator(): string
         return ' ';
     }
 
-    protected function checkResponse(ResponseInterface $response, $data)
+    protected function checkResponse(ResponseInterface $response, $data): void
     {
         if (!empty($data['error'])) {
             $error = sprintf('%s: %s', $data['error'], $data['error_description']);
@@ -162,7 +162,7 @@ protected function createResourceOwner(array $response, AccessToken $token): Key
         return new KeycloakResourceOwner($response, $token);
     }
 
-    protected function getAllowedClientOptions(array $options)
+    protected function getAllowedClientOptions(array $options): array
     {
         return ['timeout', 'proxy', 'verify'];
     }
diff --git a/Security/User/KeycloakBearerUser.php b/Security/User/KeycloakBearerUser.php
index 725c28f..be3e0cc 100644
--- a/Security/User/KeycloakBearerUser.php
+++ b/Security/User/KeycloakBearerUser.php
@@ -6,23 +6,23 @@
 
 class KeycloakBearerUser extends OAuthUser
 {
-    private ?string $accessToken;
+    private ?string $accessToken = null;
 
-    private ?string $clientId;
+    private ?string $clientId = null;
 
-    private ?string $email;
+    private ?string $email = null;
 
-    private ?string $displayName;
+    private ?string $displayName = null;
 
-    private ?string $firstName;
+    private ?string $firstName = null;
 
-    private ?string $lastName;
+    private ?string $lastName = null;
 
-    private bool $emailVerified;
+    private bool $emailVerified = false;
 
     public function __toString(): string
     {
-        return $this->getUsername();
+        return $this->getUserIdentifier();
     }
 
     public function setAccessToken(string $accessToken): self
diff --git a/Security/User/KeycloakBearerUserProvider.php b/Security/User/KeycloakBearerUserProvider.php
index 1e98a7f..ba6b69e 100644
--- a/Security/User/KeycloakBearerUserProvider.php
+++ b/Security/User/KeycloakBearerUserProvider.php
@@ -22,6 +22,7 @@ class KeycloakBearerUserProvider extends OAuthUserProvider implements KeycloakBe
 
     public function __construct(ClientRegistry $clientRegistry, HttpClientInterface $httpClient, mixed $sslVerification)
     {
+        parent::__construct();
         $this->clientRegistry = $clientRegistry;
         $this->httpClient = $httpClient;
         $this->sslVerification = $sslVerification;
diff --git a/Security/User/KeycloakUser.php b/Security/User/KeycloakUser.php
index 8d933f5..de3b55c 100644
--- a/Security/User/KeycloakUser.php
+++ b/Security/User/KeycloakUser.php
@@ -29,10 +29,10 @@ public function __construct(
         array $roles,
         AccessToken $accessToken,
         string $id,
-        ?string $email,
-        ?string $displayName,
-        ?string $firstName,
-        ?string $lastName,
+        ?string $email = null,
+        ?string $displayName = null,
+        ?string $firstName = null,
+        ?string $lastName = null,
         ?string $preferredLanguage = 'en',
         array $resources = []
     ) {
diff --git a/Security/User/KeycloakUserProvider.php b/Security/User/KeycloakUserProvider.php
index 0fab82c..4bd0dee 100644
--- a/Security/User/KeycloakUserProvider.php
+++ b/Security/User/KeycloakUserProvider.php
@@ -20,6 +20,7 @@ class KeycloakUserProvider extends OAuthUserProvider implements KeycloakUserProv
 
     public function __construct(ClientRegistry $clientRegistry, LoggerInterface $logger)
     {
+        parent::__construct();
         $this->clientRegistry = $clientRegistry;
         $this->logger = $logger;
     }
diff --git a/composer.json b/composer.json
index 8fc6102..4a457a6 100755
--- a/composer.json
+++ b/composer.json
@@ -19,23 +19,24 @@
         }
     ],
     "require": {
-        "symfony/dependency-injection": "^5.3|^6.0",
-        "symfony/framework-bundle": "^5.3|^6.0",
-        "symfony/http-client": "^5.3|^6.0",
-        "symfony/routing": "^5.3|^6.0",
-        "symfony/security-bundle": "^5.3|^6.0",
-        "symfony/http-foundation": "^5.3|^6.0",
+        "php": ">=8.1",
+        "symfony/dependency-injection": "^6.4|^7.0",
+        "symfony/framework-bundle": "^6.4|^7.0",
+        "symfony/http-client": "^6.4|^7.0",
+        "symfony/routing": "^6.4|^7.0",
+        "symfony/security-bundle": "^6.4|^7.0",
+        "symfony/http-foundation": "^6.4|^7.0",
         "knpuniversity/oauth2-client-bundle": "^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.0",
-        "symfony/expression-language": "^5.3|^6.0",
-        "symfony/finder": "^5.3|^6.0",
-        "symfony/form": "^5.3|^6.0",
-        "symfony/stopwatch": "^5.3|^6.0",
-        "symfony/twig-bundle": "^5.3|^6.0",
-        "symfony/validator": "^5.3|^6.0",
-        "symfony/yaml": "^5.3|^6.0"
+        "phpunit/phpunit": "^10.5",
+        "symfony/expression-language": "^6.4|^7.0",
+        "symfony/finder": "^6.4|^7.0",
+        "symfony/form": "^6.4|^7.0",
+        "symfony/stopwatch": "^6.4|^7.0",
+        "symfony/twig-bundle": "^6.4|^7.0",
+        "symfony/validator": "^6.4|^7.0",
+        "symfony/yaml": "^6.4|^7.0"
     },
     "autoload": {
         "psr-4": {