Can I un-enroll an invite code?

I got access to this beta through using a invite code from a friend of mine.
The next day, I received a message on my xbox stating that I had been accepted into the beta myself.

I have already played some of the beta.

Is there is anyway to get my friend’s code back so I can give it away to someone on here?

Thanks!

I’ve sent you a DM ^^

> 2533274875644727;1:
> Is there is anyway to get my friend’s code back so I can give it away to someone on here?

Afraid not OP, once it’s used it’s gone