In Kagi Feedback, it is impossible to change email if you sign up using Github

Steps to reproduce:

Sign up to Kagi Feedback using your Github account
Github provides a email, but this email does not really exist/used
You can't change your email after sign up:
1. Changing email requires a password, but you don't have one
2. Changing a password requires responding to email, but your email does not exist

If you sign up with Github, it should be possible to change your email or at least delete your account.

I feel like this was brought up at some point earlier, I'll review with our forum contractors.