Ryan Peden's tutorial on implementing ASP.NET Core authentication details the integration of the Descope SDK to simplify and secure authentication processes in modern web applications. It emphasizes the complexity of building authentication systems from scratch and suggests using Descope—a CIAM platform that supports features like OTPs, magic links, social logins, and SSO—for more efficient implementation. The guide provides a step-by-step approach to setting up a Descope account, configuring an ASP.NET Core application, and integrating authentication middleware. It includes instructions for creating login and logout pages, managing user sessions with JWTs, and adding advanced features such as SSO and custom JWT templates. Additionally, it covers the importance of middleware in validating user authentication status and demonstrates how Descope can handle session management and token refreshes, offering a scalable solution for both small and large-scale applications. The tutorial concludes by highlighting Descope's ability to streamline user management and identity services, enabling developers to focus on building secure and scalable applications.