Andrea Manzi modernized authentication workflows for the EGI-Federation/documentation repository by integrating EGI Check-in support and removing the deprecated WebFTS interface. Focusing on API integration and documentation, Andrea revised endpoints and updated sample requests to ensure seamless compatibility with the new authentication flow, enabling robust data transfer service integration. The work involved aligning API patterns with current authentication standards, enhancing maintainability and consistency across the codebase. Using Markdown for documentation and leveraging expertise in API integration, Andrea delivered a focused feature update over the month, addressing evolving infrastructure needs while ensuring that technical documentation accurately reflected all implemented changes.