问题
I want to change the expiration date of a Subscription in my Play Store using the Play Store API.
I have a Mobile App where you can buy a renewal App Store Subscription or you can get some time for free from Promos in app.
The main problem here is that if you have bought a subscription from the App Store and you want to add time by a Promo in the application, I can't change the Renewal date of your subscription to handle this new time added into your Premium. So, the App Store is going to renew your subscription and take the payment in a wrong date.
How can I handle this situation??
Android CASE: Android - Play Store - Change expiration date of a subscription
来源：https://stackoverflow.com/questions/54091930/ios-app-store-change-expiration-date-of-a-subscription