Fix the missing return null; in getUserByIdentifier

[sebwas]

Changes

I added an explicit return null; to the end of the getUserByIdentifier method of Auth0\Login\Repository\Auth0UserRepository.

References

The code otherwise is invalid and results in an exception in some cases. For reference, consider this very simple example.

Testing

Please describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. If this library has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

[x] This change has been tested on the latest version Laravel

Checklist

[x] I have read the Auth0 general contribution guidelines

[x] I have read the Auth0 Code of Conduct

[evansims]

Good catch, thank you!

[evansims]

Thanks @sebwas, your contribution was merged and will be part of the next release 👍