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+# Authentication System
+
+read/ref: https://dev.to/fadymr/php-create-your-own-php-authentication-4e20
+
+also for session: https://dev.to/fadymr/php-create-a-simple-session-wrapper-class-dpk
+
+
+
+## How to use ?
+
+
+### Registration
+
+
+    // use DevCoder\Authentication\Core\UserManager;
+    // use DevCoder\Authentication\User;
+
+    // register
+    $userManager = new UserManager();
+    $req = Registry::get('REQUEST);
+
+    $password = $userManager->cryptPassword($req->POST['password']);
+    
+    $user = (new User())
+        ->setUserName($req->POST['username'])
+        ->setPassword($password)
+        ->setRoles(['ROLE_USER']);
+
+    $userManager->createUserToken($user);
+
+    // check Token in Session
+    var_dump($userManager->getUserToken());
+    // object(DevCoder\Authentication\Token\UserToken)[4]
+    //  private 'user' => 
+    //    object(DevCoder\Authentication\User)[5]
+    //      private 'userName' => string 'username' (length=8)
+    //      private 'password' => string '$2y$10$iWdcmebmikUFlgKMqW7/rOmUp1DjFAuWKqdUHBhL08FZ7LL6bwRey' (length=60)
+    //      private 'roles' => 
+    //        array (size=1)
+    //          0 => string 'ROLE_USER' (length=9)
+    //      private 'enabled' => boolean true
+
+
+## Connected or not
+
+    <?php
+
+    // use DevCoder\Authentication\Core\UserManager;
+    // use DevCoder\Authentication\User;
+
+    $userManager = new UserManager();
+    if ($userManager->hasUserToken()) {
+        // connected
+
+        $token = $userManager->getUserToken();
+        $user = $token->getUser();
+        var_dump($user);
+    // object(DevCoder\Authentication\User)[5]
+    //  private 'userName' => string 'username' (length=8)
+    //  private 'password' => string '$2y$10$OBobeLhdvdiftuedlv1a6e4.qF6sCG/usq5WEV4E3uB.UiS1egv/m' (length=60)
+    //  private 'roles' => 
+    //    array (size=1)
+    //      0 => string 'ROLE_USER' (length=9)
+    //  private 'enabled' => boolean true
+
+    } else {
+        // not connected
+    }
+
+
+## Access management
+
+    $userManager = new UserManager();
+    if ($userManager->isGranted(['ROLE_ADMIN'])) {
+        //is admin
+        // return Response 200
+    }else {
+        //is not admin
+        // return Response 403
+    }
+
+    Logout
+
+    $userManager = new UserManager();
+    $userManager->logout();
+
+
+## Login
+
+    <?php
+
+    use DevCoder\Authentication\Core\UserManager;
+
+    $stmt = $pdo->prepare("SELECT * FROM users WHERE username=?");
+    $stmt->execute([$_POST['username']]);
+    $userFromDataBase = $stmt->fetch();
+    /**
+     * Hydration
+     */
+    $user = (new \Test\DevCoder\Authentication\User())
+        ->setUserName($userFromDataBase['username'])
+        ->setPassword($userFromDataBase['password'])
+        ->setRoles(json_decode($userFromDataBase['roles']))
+        ->setEnabled($userFromDataBase['active']);
+
+    $userManager = new UserManager();
+    if ($userManager->isPasswordValid($user, $_POST['password'])) {
+
+        // login OK, set Token in session
+        $userManager->createUserToken($user);
+
+    } else {
+     // login failed , return error
+    }