Developed an OAuth 2.0 credential support sample for the pinterest/typespec repository, focusing on secure client authentication within the TypeSpec ecosystem. The work included a Java implementation demonstrating OAuthTokenCredential usage with a custom client, along with a comprehensive Markdown README guiding users through client generation using OAuth2Auth. By illustrating how to declare OAuth 2.0 authentication directly in TypeSpec files and providing custom credential implementations, the contribution established a reusable pattern for integrating secure authentication flows. The approach emphasized API integration, client credentials flow, and clear documentation, broadening the possibilities for TypeSpec users to implement robust OAuth 2.0 authentication in their projects.