An opaque identifier for the user’s account on your system.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
Use this property to help the store detect irregular activity. For example, in a game, it would be unusual for dozens of different iTunes Store accounts to make purchases on behalf of the same in-game character.
The recommended implementation is to use a one-way hash of the user’s account name to calculate the value for this property.