Custom Referral Link & custom referral code

Demande

Let users create a custom ref links for themselves. So instead of "https://example.com/r/142" -> "https://example.com/r/mycoolname" Also, let users enter a ref code/ name when buying. Similar to the coupon input. ("Support a creator", basically) To add on this it should be possible to the referral code via a parameter on every page, e.g. "https://example.com/category/server?ref=142"