Registered at Lemmy.world - jumped accross to kbin.sh have to register but my details are 'already in use'. Can not log in, can not register. Can not be bothe

Registered at Lemmy.world - jumped accross to kbin.sh have to register but my details are 'already in use'. Can not log in, can not register. Can not be bothered (for today, at least). I will try again, maybe with different credentials, but it shouldn't be this difficult. Quick edit: happened on other fed sites, too. Worked on others, too.