I am working on an extension for V.4.3 that creates a user content folder after the email activation. It works so far but there is some behaviour I cannot understand: The workflow is linked to the after_user_activation trigger. But this workflow is always executed two times. First when a new users registers, second when he activates his account by mail. As I am quite new to ez Publish I don't have a clue where exactly in the source I can find the code that fires the trigger. I was searching the files in kernel/user/ but I didn't have any success.