How to use In-app purchase for Auto Reload?

I have an app that allows users to complete a video call and then bills them a per-minute charge for the length of the call. How can I automatically bill my app user using in-app purchase without prompting for approval?

I'm using Stripe on the web to complete an automatic purchase with the user's stored credit card. How do I accomplish the same thing on the web while on Apple device (or within my app) without prompting them for approval? They've already given approval by completing the call.

I am aware that I can create an in-app purchase product for the necessary "credits" but this will prompt them to complete the purchase which should instead be automatic. Thanks!

How to use In-app purchase for Auto Reload?
 
 
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