QR CODES IN THE GAME (Call of Duty: Warzone)

Hello! I think many of you when using the Elevator shafts have noticed the qr codes available on devices recovery.
The question arose, what will happen if they scan and did someone already doing this?
Personally, I can't catch the moment due to the fact that the code is too small and difficult to restore to it its a bad camera.
Information about this not found, it is possible that bad googled.
I would like to ask you something about that.