Hi @nanaki658,
Thank you for your reply, and I am glad you got it working using Rules.
There is no functional difference between app_metadata and user_metadata properties, only a semantic difference.
The difference between app_metadata and user_metadata is that the first should be used for information about the user that is controlled by the application (e.g. the user identifier for a legacy system, or the roles a user has), whereas user_metadata is information that the user can view and control (e.g. user settings, preferences). [Reference: Differences between client_metadata and app_metadata).]
You should be completely fine with using a Rule for this functionality but, take note that Rules may be deprecated eventually. Because of this, I recommend reading this related community post that answers questions on the timeline on deprecating Rules.
May I help you with anything else?
Thanks,
Rueben