Startup.cs

using ASPNetCoreAngular2Payments.Models;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.SpaServices.Webpack;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.IdentityModel.Tokens;
using Stripe;
using System;
using System.Text;

namespace ASPNetCoreAngular2Payments
{
    public partial class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        private IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
			services.AddIdentity<IdentityUser, IdentityRole>()
                .AddEntityFrameworkStores<AppDbContext>()
                .AddDefaultTokenProviders();

            // Add framework services
            // Make authentication compulsory across the board (i.e. shutdown EVERYTHING unless explicitly opened up).
            services.AddAuthentication(options =>
            {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            }).AddJwtBearer(cfg =>
            {
                cfg.TokenValidationParameters = new TokenValidationParameters()
                {
                    // The signing key must match!
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["SecretKey"])),

                    // Validate the JWT Issuer (iss) claim
                    ValidateIssuer = true,
                    ValidIssuer = Configuration["AppConfiguration:SiteUrl"],

                    // Validate the JWT Audience (aud) claim
                    ValidAudience = Configuration["AppConfiguration:SiteUrl"],

                    // Validate the token expiry
                    ValidateLifetime = true,

                    // If you want to allow a certain amount of clock drift, set that here:
                    ClockSkew = TimeSpan.Zero,
                };
            });

			services.AddMvc();

            var connectionString = Configuration.GetConnectionString("DefaultConnection");
            services.AddDbContext<AppDbContext>(opts => opts.UseNpgsql(connectionString));

            services.AddScoped<AngularAntiForgeryTokenAttribute>();
            services.AddAntiforgery(options =>
            {
                options.HeaderName = "X-XSRF-TOKEN";
            });

            services.AddOptions();
            services.Configure<AppSettings>(Configuration);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseWebpackDevMiddleware(new WebpackDevMiddlewareOptions {
                    HotModuleReplacement = true
                });
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseAuthentication();
            ConfigureAuth(app);

            app.UseStaticFiles();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    "default",
                    "{controller=Home}/{action=Index}/{id?}");

                routes.MapSpaFallbackRoute(
                    "spa-fallback",
                    new { controller = "Home", action = "Index" });
            });

            // Create database on startup
            using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope())
            {
                 serviceScope.ServiceProvider.GetService<AppDbContext>().Database.Migrate();
            }

            StripeConfiguration.SetApiKey(Configuration["StripePrivateKey"]);
        }
    }
}