I can't express my feelings of your "new" credential manager flow. Not only it is much less functional than before (previous was not a masterpiece, sure). But in 2024 it is almost impossible to incorporate it into multiplatform application with dependency injection, and here are two main reasons:

1. Need to pass context twice: CredentialManager.create() and credentialManager.getCredential().
2. Need to know that second context must be ActivityContext, ApplicationContext is not enough. Not Jetpack Compose-friendly.

There is a library KMPAuth that tries to fix this. But it is a shame that Google's front end - Authentication - looks so ugly.