App Store subscriptions
This MR adds a UIA stage for Apple App Store subscriptions with StoreKit v2. Note that we don't actually use StoreKit here -- we just relay the StoreKit signed transaction from the application to the server.
This MR adds a UIA stage for Apple App Store subscriptions with StoreKit v2. Note that we don't actually use StoreKit here -- we just relay the StoreKit signed transaction from the application to the server.