Dive into the first part of an in-depth interview exploring OAuth 2.0 with Aaron Parecki, author of "OAuth 2.0 Simplified," and Eric Johnson, Senior Developer Advocate at AWS Serverless. Learn about the history of OAuth, differences between versions 1 and 2, authentication vs. authorization, grant types, token management, and the PKCE grant type. Gain valuable insights into building secure APIs and understanding the OAuth 2.0 framework, suitable for developers and security professionals alike.