Cubik Studio

I've bought Cubik Studio about 1 day , but i want to know that how much users can active Cubik Studio with one key ?
I want to send the key to my friend to use first, but i don't know if i gave him the key, i won't be able to active my cubik after he use it ?
Ps: sorry for bad english, i'm from Vietnamese.

Only 1 user can use a key.

If your friend wants to use it they will need their own key.

okay, thanks for replying this