I requested Mythos access and was granted it. But now apparently I need to use Google Sign In on my account instead of email link, as email link is not secure enough. But my email is not google, it's my custom domain. Now I don't even know what to do. I don't want to buy google apps or whatever it's called just to be able to use Google SSO with my custom domain; and I don't want to register completely new account for gmail either. It's a mess.