Username & Creator Query Params

Simple feature idea:

Allow Tebex stores to support basic query parameters like:

store.tebex.io?username=Notch

Automatically pre-fill the username

store.tebex.io?creator=Tebex

Automatically apply the creator code

This would make it much easier to create:
Creator links
Affiliate campaigns
Social media promotions

Making this optional (via a store toggle) would keep flexibility while giving server owners a much simpler way to improve conversion and creator attribution.