fix user dashboard

frontend/src/pages/UserDashboard.jsx

@@ -1,6 +1,6 @@
 import { useState, useEffect } from 'react';
 import axios from 'axios';
-import { Car, Clock, CheckCircle, AlertCircle } from 'lucide-react';
+import { Car, Clock, CheckCircle, AlertCircle, Users } from 'lucide-react';
 import io from 'socket.io-client';
 
 const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:3000';