App Store Review Guideline 5.1.1(v): What is understood as OFFERING the account deletion within the app

The newly updated App Store Review Guideline 5.1.1(v) states that:

If your app supports account creation, you must also offer account deletion within the app.

The guideline leaves two important questions open:

What does it mean to offer the account deletion?

• Is it enough to point the user to the website, email, or does the deletion need to be completed within the app?
• Does Apple expect a simple account deletion (in the sense of inactivation) or a full delete-all-my-data request?

Is there a statement from Apple which specifies these details or has someone already receive an app rejection for it?