Core Identity is the officially encouraged method of authenticating users in ASP.NET Core. As you might have guessed, we're not fans of the heavy handed, black box approach needed to make Core Identity "Just work".

We want to use as much of the existing ASP.NET Authorization framework as we can while avoiding Core Identity. Thankfully, ASP.NET Supports cookie authorization without Core Identity!

Read more at requestmetrics.com:
https://requestmetrics.com/making-of/episode-15-simple-cookie-based-authentication-in-asp-net-core

Microsoft Docs On Cookie Based Authorization: https://github.com/dotnet/AspNetCore.Docs/blob/master/aspnetcore/security/authentication/cookie.md

Microsoft Cookie Authorization Examples: https://github.com/dotnet/AspNetCore.Docs/tree/master/aspnetcore/security/authentication/cookie/samples/3.x/CookieSample