not working

frontend/js/chat.js

@@ -1,5 +1,9 @@
 
-const socket = io();
+const socket = io({
+    auth: {
+        token: document.cookie.split('=')[1]
+    }
+});
 
 const form = document.getElementById('form');
 const input = document.getElementById('input');

index.js

@@ -13,7 +13,13 @@ const saltRounds = 10;
 const { Server } = require('socket.io');
 const { createServer } = require('node:http');
 const server = createServer(app);
-const io = new Server(server);
+const io = new Server(server, {
+    cookie: {
+       httpOnly: true,
+       sameSite: "strict",
+       maxAge:  30 * 24 * 60 * 60 * 1000
+    }
+});
 
 const jwt = require('jsonwebtoken');
 const {decode} = require("jsonwebtoken");
@@ -95,24 +101,38 @@ app.get('/', (req, res) => {
         }
         const username = user.username;
         res.sendFile(path.join(__dirname, '/frontend/routes/chat.html'));
-
-        // socket io connection
-        io.on('connection', (socket) => {
-            console.log(username + ' connected');
-            // disconnect event
-            socket.on('disconnect', () => {
-                console.log(username + ' have  disconnected');
-            });
-            // chat message event
-            socket.on('chat message', (msg) => {
-                const message = username + ': ' + msg;
-                console.log(message);
-                io.emit('chat message', message);
-            });
-        });
     });
 });
 
+// socket io connection
+io.use((socket, next) => {
+    const token = socket.handshake.auth.token;
+    if (token) {
+        jwt.verify(token, jwtSecret, (err, decoded) => {
+            if (err) return next(new Error('Authentication error'));
+            socket.username = decoded.username;
+            next();
+        });
+    } else {
+        next(new Error('Authentication error'));
+    }
+});
+
+io.on('connection', (socket) => {
+        const username = socket.username;
+
+        console.log(username + ' connected');
+        // disconnect event
+        socket.on('disconnect', () => {
+            console.log(username + ' have  disconnected');
+        });
+        // chat message event
+        socket.on('chat message', (msg) => {
+            const message = username + ': ' + msg;
+            console.log(message);
+            io.emit('chat message', message);
+        });
+})
 // run server
 server.listen(port, () => {
     console.log(`Chat app listening on port ${port}`);
@@ -157,7 +177,7 @@ async function loginUser(req, res) {
                 // Compare password
                 const match = await bcrypt.compare(password, result.rows[0].password);
                 if (match) {
-                    const token = jwt.sign({ username }, jwtSecret, {
+                    const token = jwt.sign({username}, jwtSecret, {
                         expiresIn: '30d' // token expires in 30 days
                     });
                     res.cookie('token', token, {
@@ -189,4 +209,4 @@ async function loginUser(req, res) {
         res.send('Please enter Username and Password!');
     }
     res.end();
-}
+}