you can see the question in the title. My friend doesn?t need the key anymore, so I would use the key for a while.
Are there any risks (he would just give me the key, no account informations) and is it even allowed?
I'm not sure, however I don't see a major issue with it to be honest as long as he does not try and call the key back and then you come on here whining that the key is not working