title: OpenIDDict and OwinOAuthProviders
body: <p>Since Identity Server 4 will achieve end of life in 2022, I am learning OpenIdDict. I understand the work flow of OpenIdDict and the samples have helped me in understanding it. Yet, there is only one thing which is unclear to me since no documentation/ samples an be found. How can you plugin external providers in to OpenIdDict (Google, GitHub, ...)? Are the packages from <a href="https://github.com/TerribleDev/OwinOAuthProviders/tree/master/src" rel="nofollow noreferrer">Owin.Security.Providers</a> usuable? If yes, how could that be achieved then?</p>