diff --git a/Sources/composer.json b/Sources/composer.json
index ae7a5099..e8d8f5a2 100644
--- a/Sources/composer.json
+++ b/Sources/composer.json
@@ -3,7 +3,9 @@
     "autoload": {
         "psr-4": {
             "Hearttrack\\": "src/",
-            "Console\\":"src/Console"
+            "Console\\":"src/console",
+            "Stub\\":"src/data/stub"
+
         }
     },
     "require": {
diff --git a/Sources/src/app/shared/Validation.php b/Sources/src/app/shared/Validation.php
new file mode 100644
index 00000000..66a2b836
--- /dev/null
+++ b/Sources/src/app/shared/Validation.php
@@ -0,0 +1,111 @@
+<?php
+namespace Utils;
+use \Exception;
+final class Validation {
+
+    /**
+     * Valide une action passée en paramètre.
+     * 
+     * @param string $action L'action à valider.
+     * @return string L'action validée si elle est conforme.
+     * @throws Exception Si l'action n'est pas valide.
+     */
+    public static function val_action($action) {
+        if (!isset($action) || !Validation::val_string($action)) {
+            throw new Exception("Pas d'action spécifiée.");
+        } else {
+            return $action;
+        }
+    }
+
+    /**
+     * Valide une chaîne de caractères.
+     * 
+     * @param string $string La chaîne à valider.
+     * @return bool True si la chaîne est valide, sinon false.
+     * @throws Exception Si la chaîne n'est pas valide (tentative d'injection de code).
+     */
+    public static function val_string(string $string) : bool {
+        if (filter_var($string, FILTER_SANITIZE_STRING) !== $string) {
+            throw new Exception("$string n'est pas valide. Tentative d'injection de code (attaque sécurité)!");
+        } else {
+            return true;
+        }
+    }
+
+    /**
+     * Valide un entier.
+     * 
+     * @param int $int L'entier à valider.
+     * @return bool True si l'entier est valide, sinon false.
+     * @throws Exception Si l'entier n'est pas valide (tentative d'injection de code).
+     */
+    public static function val_int(int $int) : bool {
+        if (filter_var($int, FILTER_SANITIZE_NUMBER_INT) !== $int) {
+            throw new Exception("$int n'est pas valide. Tentative d'injection de code (attaque sécurité)!");
+        } else {
+            return true;
+        }
+    }
+
+    /**
+     * Valide un mot de passe.
+     * 
+     * @param string $password Le mot de passe à valider.
+     * @return bool True si le mot de passe est valide, sinon false.
+     * @throws Exception Si le mot de passe n'est pas valide.
+     */
+    public static function val_password(string $password) : bool {
+        if ($password === null) {
+            throw new Exception("Le mot de passe ne peut être vide.");
+        } else {
+            if (!preg_match('/^.{6,}$/', $password)) {
+                throw new Exception("Le mot de passe n'est pas valide : au moins 6 caractères requis.");
+            }
+            return Validation::val_string($password);
+        }
+    }
+
+    /**
+     * Valide un booléen.
+     * 
+     * @param bool $done La valeur booléenne à valider.
+     * @return bool True si la valeur booléenne est définie, sinon false.
+     */
+    public static function val_bool(bool $done) : bool {
+        return isset($done);
+    }
+
+    /**
+     * Nettoie une chaîne de caractères.
+     * 
+     * @param string $string La chaîne à nettoyer.
+     * @return string La chaîne nettoyée.
+     */
+    public static function clean_string(string $string) : string {
+        return filter_var($string, FILTER_SANITIZE_STRING);
+    }
+
+    /**
+     * Nettoie un entier.
+     * 
+     * @param int $int L'entier à nettoyer.
+     * @return int L'entier nettoyé.
+     */
+    public static function clean_int(int $int) : int {
+        return filter_var($int, FILTER_SANITIZE_NUMBER_INT);
+    }
+
+    /**
+     * Nettoie une valeur booléenne.
+     * 
+     * @param bool $bool La valeur booléenne à nettoyer.
+     * @return bool La valeur booléenne nettoyée.
+     */
+    public static function clean_bool(bool $bool) : bool {
+        return filter_var($bool, FILTER_VALIDATE_BOOLEAN);
+    }
+
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/app/shared/exception/NotImplementedException.php b/Sources/src/app/shared/exception/NotImplementedException.php
new file mode 100644
index 00000000..9ec6f506
--- /dev/null
+++ b/Sources/src/app/shared/exception/NotImplementedException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Exception;
+
+final class NotImplementedException extends \Exception
+{
+    public $message = "Not implemented method call";
+}
diff --git a/Sources/src/app/views/global.css b/Sources/src/app/views/global.css
index 03aa1b9e..e4e67578 100644
--- a/Sources/src/app/views/global.css
+++ b/Sources/src/app/views/global.css
@@ -1,3 +1,7 @@
+/*You can add global styles in this files and also import other files. */
+/* @import url("path/to/syles/files"); */
+
+/* Here tailwind reserved config */
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
diff --git a/Sources/src/console/Console.php b/Sources/src/console/Console.php
index b36ba1e7..deaa512c 100755
--- a/Sources/src/console/Console.php
+++ b/Sources/src/console/Console.php
@@ -1,7 +1,9 @@
 #!/usr/bin/env php
 <?php
+use Manager\DataManager;
+use Stub\StubData;
 
-
+$model = new StubData();// Couche d'accès au model
 function clearScreen()
 {
     system('clear || cls');
@@ -94,8 +96,28 @@ function displaySettingsMenu() {
     echo "0. Retour au menu principal\n";
     echo "Choisissez une option: ";
 }
+function loginUser(DataManager $model) {
+    echo "\nEntrez votre nom d'utilisateur: ";
+    $username = trim(fgets(STDIN));
+    echo "Entrez votre mot de passe: ";
+    $password = trim(fgets(STDIN));
+    if ($model->userMgr->login($username, $password)) {
+        return true;
+    } else {
+        echo "Erreur de connexion. Essayez encore.\n";
+        return false;
+    }
+}
 
-$tmpRep = true;
+function registerUser(DataManager $model) {
+    echo "\nEntrez votre nom d'utilisateur: ";
+    $username = trim(fgets(STDIN));
+    echo "Entrez votre mot de passe: ";
+    $password = trim(fgets(STDIN));
+    $model->userMgr->register($username, $password);
+    echo "Utilisateur enregistré avec succès!\n";
+    return true;
+}
 
 while (true) {
     displayAuthMenu();
@@ -103,7 +125,7 @@ while (true) {
 
     switch ($choice) {
         case '1': // Se connecter
-            if ($tmpRep) {
+            if (loginUser()) {
                 while (true) {
                     displayMainMenu();
                     $mainChoice = trim(fgets(STDIN));
@@ -159,6 +181,7 @@ while (true) {
             break;
 
         case '2': // S'inscrire
+            registerUser();
             break;
 
         case '0': // Quitter
diff --git a/Sources/src/data/core/network/IAuthService.php b/Sources/src/data/core/network/IAuthService.php
new file mode 100644
index 00000000..dcec8839
--- /dev/null
+++ b/Sources/src/data/core/network/IAuthService.php
@@ -0,0 +1,37 @@
+<?php
+namespace Service;
+/**
+ *  Interface IAuthService
+ *  Adding more methods here may violate the Single Responsibility Principle (SRP).
+ *  It's recommended to keep this interface focused on authentication-related functionality.
+*/
+interface IAuthService {
+    /**
+     * Authenticate a user.
+     *
+     * @param string $username The username of the user.
+     * @param string $password The password of the user.
+     *
+     * @return bool True if authentication is successful, false otherwise.
+     */
+    public function login(string $username, string $password): bool;
+
+     /**
+     * Register a new user.
+     *
+     * @param string $username The username of the new user.
+     * @param string $password The password of the new user.
+     * @param string $data other data {undefined} for the moment.
+     *
+     * @return bool True if registration is successful, false otherwise.
+     */
+    public function register(string $username, string $password, ...$data): bool;
+
+    /**
+     * Logout the currently authenticated user.
+     * 
+     * @return void
+     */
+    public function logoutUser(): void;
+
+}
\ No newline at end of file
diff --git a/Sources/src/data/model/Athlete.php b/Sources/src/data/model/Athlete.php
new file mode 100644
index 00000000..c0587000
--- /dev/null
+++ b/Sources/src/data/model/Athlete.php
@@ -0,0 +1,9 @@
+<?php
+namespace Model;
+
+
+class Athlete extends Role {
+    // Attributs spécifiques a l'athlete si nécessaire
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/model/Coach.php b/Sources/src/data/model/Coach.php
new file mode 100644
index 00000000..31ed1f51
--- /dev/null
+++ b/Sources/src/data/model/Coach.php
@@ -0,0 +1,8 @@
+<?php
+use Model\Athlete;
+
+class Coach extends Athlete {
+    // Attributs spécifiques au Coach si nécessaire
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/model/Role.php b/Sources/src/data/model/Role.php
new file mode 100644
index 00000000..6e9a15ff
--- /dev/null
+++ b/Sources/src/data/model/Role.php
@@ -0,0 +1,10 @@
+<?php
+namespace Model;
+
+abstract class Role {
+    // Attributs spécifiques au Coach si nécessaire
+}
+
+
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/model/User.php b/Sources/src/data/model/User.php
new file mode 100644
index 00000000..e69de29b
diff --git a/Sources/src/data/model/manager/DataManager.php b/Sources/src/data/model/manager/DataManager.php
new file mode 100644
index 00000000..68f70011
--- /dev/null
+++ b/Sources/src/data/model/manager/DataManager.php
@@ -0,0 +1,10 @@
+<!-- It's like a DI Container for Manager -->
+
+<?php
+namespace Manager;
+
+abstract class DataManager {
+
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/model/manager/UserManager.php b/Sources/src/data/model/manager/UserManager.php
new file mode 100644
index 00000000..61d292c6
--- /dev/null
+++ b/Sources/src/data/model/manager/UserManager.php
@@ -0,0 +1,39 @@
+<?php
+namespace Manager;
+use Manager\IGenericDataManager;
+use Service\IAuthService;
+use Utils\Validation;
+// c'est le modéle
+class UserManager {
+    private IAuthService $authService;
+    public function __construct(IAuthService $authService){}
+
+    public function login($loginUser,$passwordUser): bool{
+        if(!Validation::val_string($passwordUser) || !Validation::val_string($loginUser)) throw new \Exception(" some wrong with cred !!!!!");
+        if($this->authService->login($loginUser,$passwordUser)){
+            return true;
+        }
+        return false;
+    }
+
+    public function resgister($loginUser,$passwordUser): bool{
+        if(!Validation::val_string($passwordUser) || !Validation::val_string($loginUser)) throw new \Exception(" some wrong with cred !!!!!");
+        if($this->authService->register($loginUser,$passwordUser)){
+            return true;
+        }
+        return false;
+    }
+
+    public function deconnecter():bool{
+        try {
+            $this->authService->logoutUser();
+            return true;
+        } catch (\Exception $e) {
+            return false;
+        }
+       
+    }
+}
+
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/model/repository/IGenericRepository.php b/Sources/src/data/model/repository/IGenericRepository.php
new file mode 100644
index 00000000..2adc6e03
--- /dev/null
+++ b/Sources/src/data/model/repository/IGenericRepository.php
@@ -0,0 +1,16 @@
+<?php
+namespace Model;
+
+interface IGenericRepository
+{
+    public function getItemById();
+    public function GetNbItems(): int;
+    public function GetItems(int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false): array;
+    public function GetItemsByName(string $substring, int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false): array;
+    public function GetItemByName(string $substring, int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false): array;
+    public function UpdateItem($oldItem, $newItem);
+    public function AddItem($item);
+    public function DeleteItem($item): bool;
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/stub/StubData.php b/Sources/src/data/stub/StubData.php
new file mode 100644
index 00000000..8c778ebc
--- /dev/null
+++ b/Sources/src/data/stub/StubData.php
@@ -0,0 +1,12 @@
+<?php
+namespace Stub;
+use Manager\DataManager;
+use Manager\UserManager;
+class StubData extends DataManager{
+    public $userMgr;
+    public function __construct(){
+        $userMgr = new UserManager(new AuthService(new UserRepository()));
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/stub/repository/UserRepository.php b/Sources/src/data/stub/repository/UserRepository.php
new file mode 100644
index 00000000..6aab6cd6
--- /dev/null
+++ b/Sources/src/data/stub/repository/UserRepository.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace Stub;
+
+use Model\IGenericRepository;
+use Model\IUserRepository;
+use Model\Role;
+use Model\User;
+
+class UserRepository implements IGenericRepository,IUserRepository {
+    private array $users = [];
+
+    public function __construct() {
+        // Ajout de 5 utilisateurs pour l'exemple
+        $this->users[] = new User(1, "Doe", "John", "john.doe@example.com", "password123", new Role("Coach"));
+        $this->users[] = new User(2, "Smith", "Jane", "jane.smith@example.com", "secure456", new Role("User"));
+        $this->users[] = new User(3, "Martin", "Paul", "paul.martin@example.com", "super789", new Role("Coach"));
+        $this->users[] = new User(4, "Brown", "Anna", "anna.brown@example.com", "test000", new Role("User"));
+        $this->users[] = new User(5, "Lee", "Bruce", "bruce.lee@example.com", "hello321", new Role("User"));
+    }
+
+    public function getItemById(int $id): ?User {
+        foreach ($this->users as $user) {
+            if ($user->id === $id) {
+                return $user;
+            }
+        }
+        return null;
+    }
+
+    public function GetNbItems(): int {
+        return count($this->users);
+    }
+
+    public function GetItems(int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false): array {
+        // Cette méthode est un exemple simple, on ne gère pas l'ordonnancement ici
+        return array_slice($this->users, $index, $count);
+    }
+
+    public function GetItemsByName(string $substring, int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false): array {
+        $filteredUsers = array_filter($this->users, function ($user) use ($substring) {
+            return strpos(strtolower($user->nom), strtolower($substring)) !== false || strpos(strtolower($user->prenom), strtolower($substring)) !== false;
+        });
+        return array_slice($filteredUsers, $index, $count);
+    }
+    public function GetItemByName(string $substring, int $index, int $count, ?string $orderingPropertyName = null, bool $descending = false):User {
+        return $this->GetItemsByName($substring, $index, $count, $orderingPropertyName, $descending)[0];
+    }
+
+    public function UpdateItem(User $oldUser, User $newUser): void {
+        $index = array_search($oldUser, $this->users);
+        if ($index !== false) {
+            $this->users[$index] = $newUser;
+        }
+    }
+
+    public function AddItem(User $user): void {
+        $this->users[] = $user;
+    }
+
+    public function DeleteItem(User $user): bool {
+        $index = array_search($user, $this->users);
+        if ($index !== false) {
+            unset($this->users[$index]);
+            return true;
+        }
+        return false;
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/Sources/src/data/stub/service/AuthService.php b/Sources/src/data/stub/service/AuthService.php
new file mode 100644
index 00000000..902a1fde
--- /dev/null
+++ b/Sources/src/data/stub/service/AuthService.php
@@ -0,0 +1,36 @@
+<?php
+namespace Stub;
+use Exception\NotImplementedException;
+use Model\IUserRepository;
+use Service\IAuthService;
+
+class AuthService implements IAuthService {
+    private $userRepository;
+
+    public function __construct(UserRepository $userRepository) {
+        $this->userRepository = $userRepository;
+    }
+
+    public function login($username, $password) {
+
+        $user = $this->userRepository->getUserByUsername($username);
+
+        if (!$user) {
+            throw new \Exception('Unable to find user with that name');
+        }
+        if ($user->isValidPassword($password)) {
+            return true;
+        } 
+        
+        return false;
+    }
+    public function register(string $username, string $password, ...$data): bool
+    {
+        throw new NotImplementedException("register method not implemented");
+        }
+
+    public function logoutUser(): void
+    {
+        throw new NotImplementedException("logout method not implemented");
+    }
+}
\ No newline at end of file