Unable to setup Ring Stick Up camera

My son gave me a Ring Stick-up Camera that he was not using so that I could use it.Unfortunately he is having issues getting into his Ring account and has contacted Ring Support who have not been able to resolve that issue for him.I have physical possession of the camera and would like to get it into my account so that I can use it along with my existing devices.We thought of trying this from my end to see if we can get it removed from my son's Ring account and set up into mine.Whatever assistance can be provided would be greatly appreciated.