Registration

[davepurcell]

I know this is probably very advanced.

I was looking for maybe a mod that could be used when a user registers if they have a code they get put into a certain group or something?

[Speysider]

This mod : https://vborg.vbsupport.ru/showthread.php?t=186076
Allows users to choose a usergroup on registration.

I'm unsure if a mod like you request exists though. Do a search would be my best option.