title: How to get IAP receipt
body: <p>Our dev team are developing payment functionalities. I am responsible for Apply Pay backend purchase validation. I will call App Store's verify API:<code>verifyReceipt: https://sandbox.itunes.apple.com/verifyReceipt</code> to verify the receipt passed from ios client. And now, ios client is not ready for developing, so i can not get a <code>receipt</code> to verify. So, is there any workaround to get it?</p>