Cyb3r
Well-known member
View attachment 117975
Sorry, that went right over my head. I have no idea what to do with that. I you can explain what goes where I would be very happy!
I don't know how that add-on works, but I think it uses custom php callback just like custom user fields, so you can follow this tuts here it will get you starting.
https://xenforo.com/community/resources/using-php-callbacks-in-custom-fields-by-waindigo-guide.2979/
This one too:
https://xenforo.com/community/threads/custom-user-field-callback-validate-value.28284/