Examples of different OpenID Connect identity providers using this solution
See example in this repo.
https://github.com/damienbod/bff-openiddict-aspnetcore-angular
https://github.com/damienbod/bff-auth0-aspnetcore-angular
https://github.com/damienbod/bff-azureadb2c-aspnetcore-angular
https://github.com/damienbod/bff-MicrosoftEntraExternalID-aspnetcore-angular