
FabianS.37671 (Customer) asked a question.
Is there a way to initialize a user attribute based on an expression when a user is created via self-service registration (and the corresponding attribute is not part of the signup form)?
My use case is that I'd like to assign a value automatically, without allowing the user to enter (or modify) it.

An Inline Hook is available to customize the self-registration process, if you have the skill or resources to set up an external web service. Read about Inline Hooks here:
and about the registration hook specifically, here:
Mike