title: Cancelling a user's subscription through the backend
body: <p>I have a game created in Unity wherein we have subscriptions enabled for various prized packs. We are storing the details of this subscription in a DB in the backend. I wanted to check if it's possible to cancel the subscriptions through the backend itself - if a particular API exists for Google and Apple stores to do the same for all users belonging to a particular prized pack. Changing the status in our DB for the subscriptions is straightforward, but how do we stop the Google and Apple stores from charging these players on a monthly basis? Or does there exist some way to mark a particular subscription pack as obsolete?</p>