Are there any plans to support new RavenDB 4.0 with RavenDbUserAuthRepository?
The ID handling has changed in RavenDB 4.0 because of its new distributed model. By default its a string like UserAuths/1-A, where A is the node. There are ways to get arround it: https://ravendb.net/docs/article-page/4.0/csharp/client-api/document-identifiers/working-with-document-identifiers#identities
No there's currently no feature request for it and the RavenDB Auth Provider was community contributed, given v4 is a breaking change we're reluctant to force any breaking changes ourselves. The best way for it to be upgraded would be for someone using it in production to upgrade it carefully and document all the issues/workarounds needed to support v4 clients.