Cleaned up unused imports including `timezone` and `ExpiredSignatureError`. Streamlined the import structure to improve readability and maintainability. These changes do not affect functionality but enhance code clarity.
Updated `decode_token` for stricter validation of token claims and explicit error handling. Added utilities for token revocation and verification, improving
Introduced unit tests for `get_current_user`, `get_current_active_user`, and security functions like token creation and decoding. Also refactored imports for consistency and cleaned up unused or misplaced code to improve maintainability.
