Action Hook: Fires after the validation of a new signup.

Filter Hook: Filter here to edit the error message about the invalid field value.

Filter Hook: Filters the user meta used for signup.

Action Hook: Fires after the completion of a new signup.

Action Hook: Fires right before the loading of the Member registration screen template file.

Filter Hook: Filters the template to load for the Member registration page screen.

Action Hook: Fires before the validation of a new signup.