For many years, Dominick Baier has been involved with the IdentityServer OSS project. IdentityServer is an OAuth 2.0 and OpenID Connect framework for .NET--and in its latest incarnation for ASP. NET Core. Using IdentityServer, you can implement modern authentication within your applications and it makes it easy to add features like Single Sign-On, Federation and API access control.
If you would like to know more about Dominick, check out our time with him in our second episode of the MVP Show direct from his hometown in Heidelberg, Germany. If you're interested in a conceptual overview of what a token server is and how it is used in modern applications, make sure to watch our bonus footage of our time with him.