In this Getting Started book, we have given you an overview of how OAuth 2.0 works for obtaining authorized access to user data and why it is important to improve security and user productivity. As an application developer, you should now understand the different authorization flows available and how to decide between them when an API provider supports multiple flows. We’ve also introduced OpenID Connect, discussed how it builds on top of the OAuth 2.0 protocol to enable user authentication, and some of the different security properties of authentication versus authorization. We hope the protocol-level foundation provided by this book will make you a better developer, even if you end up using libraries t....