Created a pull request. Feel free to remove this thread if you so seem fit.

I started to go through the code, set up a local environment and am currently working on the fix. :)

Hi!

I registered without providing an username for KGS, and am unable to edit it now. I can change OGS username without a problem. So, either KGS username editing is missing altogether from the page, or it's behind a simple check along the lines of…