fixed the cors

Backend/check-admin.js

+require('dotenv').config();
+const mongoose = require('mongoose');
+const User = require('./models/User');
+
+const checkAdmin = async () => {
+  try {
+    // Connect to MongoDB using the URI from .env
+    const conn = await mongoose.connect(process.env.MONGODB_URI);
+    console.log(`\n✅ Connected to MongoDB: ${conn.connection.host}`);
+    
+    // Find users with the role 'admin'
+    const admins = await User.find({ role: 'admin' }).select('-password'); // Exclude password from logs
+    
+    if (admins.length > 0) {
+      console.log(`\n🎉 Found ${admins.length} Admin User(s) in the database:\n`);
+      console.log(admins);
+    } else {
+      console.log('\n❌ No admin users found in the database. When the server starts up, it should automatically create admin@test.com if it doesn\'t exist.');
+    }
+    
+    process.exit(0);
+  } catch (error) {
+    console.error('\n❌ Error connecting to database or checking admins:');
+    console.error(error.message);
+    process.exit(1);
+  }
+};
+
+checkAdmin();

Backend/server.js

@@ -14,7 +14,11 @@ const app = express();
 
 // Middleware
 app.use(cors({
-  origin: 'http://localhost:4200', // Angular dev server
+  origin: [
+    'http://localhost:4200', 
+    'https://quiz-master-oxo7-4r2hvqr2w-aravind05rk.vercel.app',
+    process.env.FRONTEND_URL
+  ].filter(Boolean),
   credentials: true
 }));
 app.use(express.json());