OpenID Connect and OAuth 2.0 Framework for ASP.NET Core
Why do you think that https://github.com/DuendeSoftware/IdentityServer is a good alternative to IdentityServer4
OpenID Connect and OAuth 2.0 Framework for ASP.NET Core
Why do you think that https://github.com/DuendeSoftware/IdentityServer is a good alternative to IdentityServer4