Basic Auth for Try It in the modern stoplight docs?

In api-docs.io, one of the great stoplight projects, the implementation of basic auth in the theme makes it VERY EASY for people to use “Try It” and enter their basic auth credentials. Now, I can’t find that in the paid version of stoplight. Where did it go? How do I find it?

@olivier did you ever figure this out? I find this frustrating because it seems like it would be very easy, but struggling to make it happen. Thanks!