How to Change email address on this support forum?

How can I change the email address associated with my account here. Have explored the profile settings, upper right corner, doesn’t seem to be a way. There is a notice saying “Email can be updated from authentication provider. Never shown to the public.” What authentication provider?

I think the community forum has SSO with (i.e. that’s the “authentication provider”). So if you log into that site with the same credentials, you can click on “My Account” in the top right and edit it there.