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ASP.NET Core 3.0 - Enable Authentication

Quick tip for anyone using ASP.NET Core 3.0 (especially when you did an upgrade from ASP.NET Core 2.x); if you want to enable authentication don’t forget to add the correct middleware. You need both UseAuthentication and UseAuthorization:

In earlier versions of ASP.NET Core, authorization support was provided via the [Authorize] attribute. Authorization middleware wasn't available. In ASP.NET Core 3.0, authorization middleware is required(!). Therefore the ASP.NET Core Authorization Middleware (UseAuthorization) should be placed immediately after UseAuthentication.

Add the UseAuthorization and UseAuthentication methods AFTER the UseRouting() but BEFORE the UseEndpoints():

A DefaultPolicy is initially configured to require authentication, so no additional configuration is required.

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