Adding/ removing "isRepairFacility" trait on purpose

[EBER-Monsterframe]

Hello& thanks for reading,
I would like to build in a real simple shop that sells the ability to repair the players system by a token.
Player gives token --> Object becomes repairFacility
Player repair its vehicle --> Object looses repairFacilitty trait
Player gives token --> And so on (real simple)

Ive found https://github.com/acemod/ACE3/tree/master/addons/repair/functions
Im a newbie to ace but gues that https://github.com/acemod/ACE3/blob/master/addons/repair/functions/fnc_moduleAssignRepairFacility.sqf
will become my key element to remove the trait.

I just dont understand how to make it work...
Can someone introduce me into the ace-universe and make me an example?

[EBER-Monsterframe]

Ive received an anwser in the discord like you can see in the image Ive attached.
You could also read my next question there.