The reason I ask is the main concern is we’d like auth0 stuff happening on a single sign on app that we host and control on our own servers, not some custom/hosted page on auth0’s end.
So in summary, we’d have a single app (domain a for example) servicing other apps (domain b, and domain c for instance). Domain a would be the only place utilizing logic with auth0 and would be hosted on our own servers. People signed in to domain a are signed into domain b and c as well. Requests to domain b and c auth silently and only redirect to domain a if we need to authenticate.