Startup.cs

using ClientSite.Oidc;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace ClientSite
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddLogging(_ => _.AddConsole());

            services.AddRouting();

            services.AddControllersWithViews();

            services.AddOidcAuthentication();
        }



        public void Configure(IApplicationBuilder app)
        {
            app.UseDeveloperExceptionPage();

            app.UseStaticFiles();

            app.UseAuthentication();

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(_ => _.MapDefaultControllerRoute());
        }
    }
}