Startup.cs

namespace Slay.Host.OAuth.Server
{
    using System.Collections.Generic;
    using System.Linq;

    using IdentityServer4.Models;

    using Microsoft.AspNetCore.Builder;
    using Microsoft.AspNetCore.Hosting;
    using Microsoft.Extensions.DependencyInjection;

    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();

            services.AddIdentityServer()
                .AddDeveloperSigningCredential()
                .AddTestUsers(InMemoryConfiguration.Users().ToList())
                .AddInMemoryClients(InMemoryConfiguration.Clients())
                .AddInMemoryApiResources(InMemoryConfiguration.ApiResources())
                .AddInMemoryIdentityResources(new List<IdentityResource> { new IdentityResources.OpenId(), new IdentityResources.Profile() });
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseIdentityServer();

            app.UseStaticFiles();
            app.UseMvcWithDefaultRoute();
        }
    }
}