I dont have fuuuckinnnng facebook.fuuuckinnnng facebook and spotify. Useless bull shiit. I will delete my account after period ends. 4 page and they didnt solve it. Stupid engeneers. useless product managers.
I had the same problem and found that one of my devices (Iphone) was still signed on to Spotify. When I logged out on my phone I tried right away to log in on my Mac and it went right through. No problems anymore. That might explain why some other people had no problems when they logged in with another users information? They might have a device still logged in and it prevents them from logging in again with another device.