implement user authentication with login functionality and database integration

backend/routes/api.js

@@ -0,0 +1,26 @@
+import express from "express";
+import { loginFunc, getItemsFromDatabase } from "../services/database.js";
+import { authenticate, generateToken } from "../services/tokenService.js";
+const router = express.Router();
+
+// Example endpoint
+router.post("/login", async (req, res) => {
+  const result = await loginFunc(req.body.username, req.body.password);
+  if (result.success) {
+    const token = await generateToken({ username: req.body.username });
+    res.status(200).json({ message: "Login successful", token });
+  } else {
+    res.status(401).json({ message: "Invalid credentials" });
+  }
+});
+
+router.get("/items", authenticate, async (req, res) => {
+  const result = await getItemsFromDatabase();
+  if (result.success) {
+    res.status(200).json(result.data);
+  } else {
+    res.status(500).json({ message: "Failed to fetch items" });
+  }
+});
+
+export default router;