What is event of employee-user creation in Application

Summary:

What is the Trigger point when employee-User is Created in application

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HI

We have a requriment to change the trigger point of employee login user, is there any way to define trigger in oracle application, for exmpale, system don't create user unitl emial address not define at Under Persoson > Communiation >email.

Is there any wey to define this trigger envent or any other workaround to do so.

Version (include the version you are using, if applicable):

23.C

Code Snippet (add any code snippets that support your topic, if applicable):