Worked on the mmoayyed/cas repository to enhance authentication data fidelity by improving Google Authenticator REST registration flows. Focused on backend development using Java, the work introduced a feature that includes the device name in OneTimeTokenAccount REST registration headers, ensuring alignment between account names and registration data. Expanded automated test coverage to validate that required headers are present in REST save requests, supporting robust API integration and reducing potential misalignment issues. These changes improved data integrity and analytics within authentication flows, with no major regressions observed. The approach emphasized REST API design, backend reliability, and comprehensive testing throughout the process.