class AuthService {
  Future<Map<String, dynamic>> login(String email, String password) async {
    // شبیه‌سازی API Call
    await Future.delayed(const Duration(seconds: 2));

    if (email == 'test@example.com' && password == 'password123') {
      return {'token': 'xyz123', 'name': 'John Doe'};
    } else {
      throw Exception('Invalid credentials');
    }
  }
}