Arnxxau enhanced authentication data fidelity in the mmoayyed/cas repository by improving Google Authenticator REST registration flows. They delivered a feature that adds the device name to OneTimeTokenAccount registration headers, ensuring account names are accurately reflected in registration data. Using Java and focusing on backend development and API integration, Arnxxau expanded automated test coverage to validate required headers in REST save requests. This approach reduced misalignment between account names and registration data, supporting better analytics and user experience. The work demonstrated depth in REST API design and testing, with no major regressions observed after landing the changes in the repository.