It looks like custom identity stores are deprecated in 10.7+
Set up a custom identity store using ASP.NET—ArcGIS Server Administration (Windows) | ArcGIS Enterprise
What will be a suitable alternative moving forward to connect ArcGIS server to my custom applications identity/roles store? My specific needs are to restrict access to services based on membership of roles that are stored inmy database. I'm assuming the identify of the user can be managed jointly somehow.
It looks like I could replicate changes in my store by pushing them into ArcGIS via the rest API, but this seems fragile.
Thanks for the advice, Matt