Worked on authentication modernization and security enhancements for the totvs/winthor-smart-hub-layouts repository, focusing on updating the GRUPONC refresh token workflow. The approach involved removing BodyRaw usage in favor of a more secure Authorization header with Basic CREDENCIAL_NC, and updating the token endpoint to /api/v1/oauth/token to align with new authentication contracts. Leveraged skills in API integration, authentication, and configuration management, primarily utilizing JSON for configuration and data exchange. The work improved token lifecycle reliability and compatibility, addressing evolving security requirements while maintaining clear, maintainable code. Delivered the feature across two commits, with no reported bug fixes during the period.