Assuming I provide something like a "Delete Account" button on my webpage and/or App, which, after pressed by the user, deletes all his data, and I point this out in my privacy policy. If such a button is accessible after login, there is no requirement for any user identification process which would simplify things.
Now assuming a GDPR related request by a user to delete his data, do I have to do this, or can I ask the user to do it by himself (by pressing the Delete-button), or can I ignore the request because the user agreed to the privacy policy and should be aware of the button?