For some reason, I managed to clear my browser cache and had to login again. I was thinking that I have used my github account, but I was wrong. A new account was created with an 0 at the end.
Now I can’t login again with my original account. Everytime I log out and and press the Login-Button, I am getting automatically logged in, not matter how often I delete my cookies and clear the cache (in chrome), currently writing from Safari, as I could login here.
I was hoping I could simply delete this new account, but there’s no delete button in my preferences.