3. 1.1 BUSINESS: PAYMENTS - IN-APP PURCHASE
Business - 3.1.1
Your app includes an account registration feature, which is considered an access to external mechanisms for purchases or subscriptions to be used in the app.
This feature does not comply with the App Store Review Guidelines.
We've attached screenshot(s) for your reference.
Please remove the account registration links and any other fully qualified links to your site that could indirectly provide access to these mechanisms, such as links to web pages for support, FAQ, product or program details, etc.