I can't re-register the same username because it already exists. And I can't log into that username because I didn't receive the confirmation email. Alternatively, I tried to do a password reset but have not received an email for that either.

I've just activated all unconfirmed accounts. You should now be able to sign in with no issues.

Thanks for your patience !

I'm still getting "User is not confirmed" :( user @matt

Working now :)