Inara.cz is a site where lots of people register their groups. At the moment you can only choose between PC and Xbox platforms. It's run by one guy (I think!) called Artie. At least he's answering all the queries on the noticeboard there.
That's good information but I'm not sure we are discussing the same thing. I played the original game in the 80's but I don't remember my username in the game. Is there any way to recover that information and transfer it into the ps4 version?