Refactor code structure and remove redundant sections for improved readability and maintainability

backend/controllers/authController.js

@@ -27,8 +27,8 @@ const activate = async (req, res, next) => {
 
 const loginUser = async (req, res, next) => {
   try {
-    const { email, password } = req.body;
-    const result = await login(email, password);
+    const { email, password, rememberMe } = req.body;
+    const result = await login(email, password, { rememberMe });
     res.status(200).json(result);
   } catch (error) {
     next(error);
@@ -37,7 +37,7 @@ const loginUser = async (req, res, next) => {
 
 const logoutUser = async (req, res, next) => {
   try {
-    const token = req.headers['authorization']?.split(' ')[1];
+    const token = req.headers['authorization']?.split(' ')[1] || req.headers.authcode;
     const result = await logout(token);
     res.status(200).json(result);
   } catch (error) {

backend/services/authService.js

@@ -65,7 +65,7 @@ const activateUser = async (activationCode) => {
   return user;
 };
 
-const login = async (email, password) => {
+const login = async (email, password, options = {}) => {
   if (!email || !password) {
     const err = new Error('Email und Passwort sind erforderlich.');
     err.status = 400;
@@ -83,13 +83,17 @@ const login = async (email, password) => {
     err.status = 403;
     throw err;
   }
-  const token = jwt.sign({ userId: user.id }, process.env.JWT_SECRET, { expiresIn: '3h' });
+  const rememberMe = Boolean(options.rememberMe);
+  const expiresInMs = rememberMe ? 90 * 24 * 3600 * 1000 : 3 * 3600 * 1000;
+  const expiresIn = rememberMe ? '90d' : '3h';
+  const expiresAt = new Date(Date.now() + expiresInMs);
+  const token = jwt.sign({ userId: user.id }, process.env.JWT_SECRET, { expiresIn });
   await UserToken.create({
     userId: user.id,
     token,
-    expiresAt: new Date(Date.now() + 3 * 3600 * 1000),
+    expiresAt,
   });
-  return { token };
+  return { token, expiresAt: expiresAt.toISOString() };
 };
 
 const logout = async (token) => {