Identity Management is an essential part of any solution. In this post, I will build an Identity Service by using IdentityServer4 and ASP.NET Identity with .NET Core 3.1
How To Verify Roles From Db With Authorization Handler ASP.NET CORE 2.2
If you are building a solution that supports roles based authorization in ASP.NET CORE 2.2, most probably you are using ASP.NET Identity.