Bug I've found
So you can login into whatever account you want just by typing the nickname as login and random password.I still didn't totally figure out how it works, but I tried to do that with person named "Guard", (I will put screenshot as proof).
It worked, I could see his accounts details like I was logged in into mine, but I couldn't do anything with the acc at all, either than watching his replies and playing singleplayer. So since I couldn't buy, sell or at least play with the acc this isn't a very big deal, but still it needs to be fixed, I tried to find another thread about this, but didn't find anything, I don't know, this may be a well known bug, but still.