Does refresh() throw if it fails to refresh, or does the returned value need to be checked?

## Documentation Feedback

This is mostly a question, but I think the answer would be good to include in the documentation. Suppose the following:

- I call await refresh() inside a try catch block with a refresh token
- The user's account has been deactivated, so the refresh should fail

Will refresh() throw an error, or will the RefreshResult need to be checked to see if it failed?