diff --git a/examples/demo-app/src/services/orderService.ts b/examples/demo-app/src/services/orderService.ts
new file mode 100644
index 0000000..e8695c7
--- /dev/null
+++ b/examples/demo-app/src/services/orderService.ts
@@ -0,0 +1,8 @@
+import { getUser } from '../lib/auth';
+import { db } from '../lib/db';
+
+export async function getOrderForUser(orderId: string, userId: string) {
+  const user = await getUser(userId);
+  if (!user) throw new Error('User not found');
+  return db.order.findUnique({ where: { id: orderId } });
+}