diff --git a/Project/php/controller/FrontController.php b/Project/php/controller/FrontController.php
index bb85901..1987d76 100755
--- a/Project/php/controller/FrontController.php
+++ b/Project/php/controller/FrontController.php
@@ -38,6 +38,10 @@ class FrontController
                 $controller = $match['target'] ?? null;
                 $action = Validation::val_action($match['params']['action'] ?? null);
                 $id = $match['params']['id'] ?? null;
+                if(!$this->checkIdExist($id)) {
+                    throw new Exception("L'identifiant est invalide");
+                }
+
                 print 'user Id received ' . $id . '<br>';
                 print 'controleur appelé ' . $controller . '<br>';
                 print $action . '<br>';
@@ -93,4 +97,11 @@ class FrontController
         $user = $model->connection($login, $password);
         $this->home();
     }
+    public function checkIdExist($id):bool
+    {
+        $mdl = new MdlStudent();
+        $res = $mdl->checkIdExist($id);
+        return $res;
+    }
+
 }
\ No newline at end of file
diff --git a/Project/php/controller/StudentController.php b/Project/php/controller/StudentController.php
index eda3c1c..b2a9571 100755
--- a/Project/php/controller/StudentController.php
+++ b/Project/php/controller/StudentController.php
@@ -8,6 +8,8 @@ use Exception;
 class StudentController
 {
 
+
+
     public function affAllVocab(): void
     {
         global $twig;
@@ -17,6 +19,7 @@ class StudentController
 
     }
 
+
     public function affAllStudent(): void
     {
         global $twig;
diff --git a/Project/php/gateway/UserGateway.php b/Project/php/gateway/UserGateway.php
index fee192a..1bff787 100755
--- a/Project/php/gateway/UserGateway.php
+++ b/Project/php/gateway/UserGateway.php
@@ -296,4 +296,17 @@ class UserGateway extends AbsGateway
             throw new Exception($e->getMessage());
         }
     }
+    public function checkIdExist(int $id): bool {
+        $query = "SELECT COUNT(*) AS count FROM User_ WHERE id = :id";
+        $args = array(':id' => array($id, PDO::PARAM_INT));
+        $this->con->executeQuery($query, $args);
+        $results = $this->con->getResults();
+
+        if (is_array($results) && count($results) > 0) {
+            $count = $results[0]['count'];
+            return ($count > 0);
+        }
+
+        return false;
+    }
 }
\ No newline at end of file
diff --git a/Project/php/model/MdlAdmin.php b/Project/php/model/MdlAdmin.php
index aceb76a..85859de 100755
--- a/Project/php/model/MdlAdmin.php
+++ b/Project/php/model/MdlAdmin.php
@@ -74,6 +74,33 @@ class MdlAdmin extends AbsModel
 
     public function is()
     {
-        // TODO: Implement is() method.
+        if (
+            isset($_SESSION['id']) &&
+            isset($_SESSION['password']) &&
+            isset($_SESSION['email']) &&
+            isset($_SESSION['name']) &&
+            isset($_SESSION['surname']) &&
+            isset($_SESSION['nickname']) &&
+            isset($_SESSION['image']) &&
+            isset($_SESSION['extraTime']) &&
+            isset($_SESSION['group']) &&
+            isset($_SESSION['roles']) &&
+            $_SESSION['roles'] === 'admin'
+        ) {
+            $id = (int)$_SESSION['id'];
+            $password = $_SESSION['password'];
+            $email = $_SESSION['email'];
+            $name = $_SESSION['name'];
+            $surname = $_SESSION['surname'];
+            $nickname = $_SESSION['nickname'];
+            $image = $_SESSION['image'];
+            $extraTime = (bool)$_SESSION['extraTime'];
+            $group = (int)$_SESSION['group'];
+            $roles = $_SESSION['roles'];
+
+            return new User($id, $password, $email, $name, $surname, $nickname, $image, $extraTime, $group, $roles);
+        } else {
+            return null;
+        }
     }
 }
\ No newline at end of file
diff --git a/Project/php/model/MdlStudent.php b/Project/php/model/MdlStudent.php
index befc845..9685efe 100755
--- a/Project/php/model/MdlStudent.php
+++ b/Project/php/model/MdlStudent.php
@@ -13,9 +13,12 @@ class MdlStudent extends AbsModel
     {
         parent::__construct("student");
     }
+    public function checkIdExist(int $id):bool {
+        $gtw = new UserGateway();
+        return $gtw->checkIdExist($id);
+    }
 
     public function getAll():array{
-        global $twig;
         $gtw = new VocabularyListGateway();
         return  $gtw->findAll();
         /*
@@ -49,7 +52,35 @@ class MdlStudent extends AbsModel
 
     public function is()
     {
-        // TODO: Implement is() method.
+        if (
+            isset($_SESSION['id']) &&
+            isset($_SESSION['password']) &&
+            isset($_SESSION['email']) &&
+            isset($_SESSION['name']) &&
+            isset($_SESSION['surname']) &&
+            isset($_SESSION['nickname']) &&
+            isset($_SESSION['image']) &&
+            isset($_SESSION['extraTime']) &&
+            isset($_SESSION['group']) &&
+            isset($_SESSION['roles']) &&
+            $_SESSION['roles'] === 'student'
+        ) {
+            $id = (int)$_SESSION['id'];
+            $password = $_SESSION['password'];
+            $email = $_SESSION['email'];
+            $name = $_SESSION['name'];
+            $surname = $_SESSION['surname'];
+            $nickname = $_SESSION['nickname'];
+            $image = $_SESSION['image'];
+            $extraTime = (bool)$_SESSION['extraTime'];
+            $group = (int)$_SESSION['group'];
+            $roles = $_SESSION['roles'];
+
+            return new User($id, $password, $email, $name, $surname, $nickname, $image, $extraTime, $group, $roles);
+        } else {
+            return null;
+        }
     }
+
 }