My friend set up a Superpowers server on his computer and I set my username to something random as a joke

Now every time I connect to the server, the username is still there, haunting me

How can I change my username?

SOLVED! I was doing this through a browser.

I went into my settings and deleted any cookies I had containing the server's address.

Indeed, deleting cookies is the only way for now! We'll have to come up with a better way at some point. This will tie into http://itch.io/t/13677/identity-user-settings-and-...

EDIT: Actually if you're in the browser, you can navigate to http://localhost:4237/login and change your username there.