Consider deprecating old hooks API

**Problem**
When working with auth, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

No file, test, or entry point is named. Start by locating the authentication error-handling entry points in the repository and reviewing the current messages. Done means the auth errors are more descriptive and the requested error-handling improvement is covered by the project’s existing validation approach.

Written by the indexing model from the issue text.