Byounggeol Cho enhanced the TOAST-DOCS/TOAST-Cloud repository by delivering targeted improvements to public API IAM documentation and implementing new IAM-related API features. Over two months, he focused on refining Markdown-based documentation to clarify constraints, field usage, and organization account protocols, supporting better onboarding and governance for developers. He introduced endpoints for password policy retrieval and token management, and expanded documentation with Chinese localization to improve accessibility. Leveraging skills in API documentation and technical writing, Byounggeol maintained high documentation quality, reduced ambiguity for API consumers, and ensured that updates were clearly tracked through formal release notes and repository commits.