snippet added

snippets/jwt.js

@@ -0,0 +1,37 @@
+
+const jwt = require('jsonwebtoken');
+const express = require('express');
+const app = express();
+
+app.use(express.json());
+
+const SECRET_KEY = process.env.SECRET_KEY;
+const PORT = process.env.PORT || 3000; 
+
+app.post('/login', (req, res) => {
+    const { username, password } = req.body;
+
+    // Example: Simple user validation
+    if (username === "user" && password === "password") {
+        const token = jwt.sign({ username }, SECRET_KEY, { expiresIn: '1h' });
+        return res.json({ token });
+    }
+
+    res.status(401).json({ message: "Invalid credentials" });
+});
+
+// Protected route
+app.get('/protected', (req, res) => {
+    const token = req.headers.authorization?.split(' ')[1];
+
+    if (!token) return res.status(401).json({ message: "Access denied" });
+
+    try {
+        const decoded = jwt.verify(token, SECRET_KEY);
+        res.json({ message: "Access granted", user: decoded });
+    } catch (err) {
+        res.status(403).json({ message: "Invalid token" });
+    }
+});
+
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));