i need to check user information in receipt, during IAP. i watched developer documents for In App Purchase, but there is no user information in App Store receipt data. As app_account_token, it has to be UUID. but i dont want to put UUID. just string. For example, Google Play have so called "developer payload" field for this purposes, other providers also have possibility to add external data.
can't i send developerPayload in receipt during IAP?