* Update Auth version to 4.3.0
* Revert "Removes user meta from public API (#308)"
This reverts commit 1602391bf8.
* Revert "Removes metadata from swift sample (#318)"
This reverts commit 804ff523a2.
- Fixes non-default auth operations by not referring to the default auth.
- Fixes non-current user operations by always associating the auth instance with the user instance.
- Defends against changing of API key by not persisting the API key.