Account locked: OAuth login disabled & cannot set local password

Hi PG WWW Infrastructure Team,

My account info:
Username: Ewan Young
Registered email: kdbase(dot)hack(at)gmail(dot)com

Problems:
1. When trying GitHub/Google OAuth login on commitfest.postgresql.org,
error shows: "OAuth login not allowed to this account."
2. This account was created via third-party OAuth, so self-service
password reset page rejects password change, prompt: "This account
cannot change password as it's connected to a third party login site."
3. I can neither log in via OAuth nor create a native password to log
in with username/password.

Requests:
1. Detach all third-party OAuth bindings from my account;
2. Generate a temporary password for my native account, or enable me
to set a new password via reset link;
3. Restore normal username/password login access for CommitFest.

If needed, I can provide patch links I submitted before to verify
account ownership.
Thanks a lot!

--
Regards,
Ewan Young