added login function to user frontend panel

panel-mgmt_backend/server.js

@@ -29,7 +29,21 @@ app.listen(port, () => {
 
 // -- here comes the main code --
 app.get("/", (req, res) => {
-  res.render("index.ejs");
+  res.render("index.ejs", { error: null });
+});
+
+app.post("/login", (req, res) => {
+  loginUser(req.body.username, req.body.password).then((result) => {
+    if (result.success) {
+      // On successful login, render the dashboard and update latestUser
+      res.status(200).render("userView.ejs");
+    } else {
+      // On failure, re-render login page with error message
+      res
+        .status(401)
+        .render("index.ejs", { error: result.message, });
+    }
+  });
 });
 
 // error handling code