we are having an issue with the new marketplace" account deletion notification". According to previous suggestions from premium support we switched our backend system authentication back from 0Auth to Auth'n'Auth. But looking at the getPublicKey method that is necessary to validate incoming "account deletion notifications" we can see that 0Auth is required.
So the question would be:
How to validate an incoming "account deletion notification" with Auth'n'Auth? (since it would be pointless to go through two different auth flows as a user).