Про создание безопасных приложений на ASP.NET Core
https://auth0.com/blog/how-to-build-and-secure-web-apis-with-aspnet-core-3/
https://auth0.com/blog/how-to-build-and-secure-web-apis-with-aspnet-core-3/
Auth0 - Blog
Authorization for ASP.NET Web APIs
How to enable authorization for ASP.NET Web APIs by limiting access to their endpoints through Auth0 authentication and authorization services.