does anyone have a FirebaseAuth alternative that they have enjoyed using for multiplatform android & ios projects? I've been pretty unhappy with firebase, especially since they don't have any documentation for Compose or SwiftUI (and the accompanying architecture you would typically use with each)

https://firebaseopensource.com/projects/gitliveapp/firebase-kotlin-sdk/ I cant say I enjoyed it, but this works. I am using this KMP SDK in Compose multiplatform with slightly modification in swiftui to launch Google login/play services required. Which Firebase things in auth layer do you need?