Learn how to implement authentication in an ASP.NET Core application using C# and IdentityServer4 in this 39-minute video tutorial. Add Identity and IdentityServer4 packages to your project, configure the login screen, and ensure proper authentication functionality. Gain hands-on experience with the OpenID Connect specification and explore the IdentityServer4 documentation. Follow along with the Tricking Library project, part of a comprehensive series on building web applications with ASP.NET Core. Access additional resources, including the source code on GitHub, to enhance your learning experience.