How do I associate an auto-renewable subscription in a way that lets me know which notifications are for which users in MY database? Is there some sort of id from the original receipt that I can store as a field for a User?
It is great that I know when a user cancels or renews, etc but it doesn't help that I am not sure which user this is happening for.
When you visit the docs and scroll down to Status Update Notifications, you'll notice that status notifications do have an original_transaction_id field, is this something that persists and can be relied on?