如何在asp.net vnext中注册身份验证类型名称

所以我正在更新MongoDB的开源asp.net身份提供程序。Net Identity 3.0(又名vnext)。到目前为止，我已经能够注册提供商并创建用户，但当使用SignInManager时，如果提供了正确的UserName/Pass，我会得到错误

InvalidOperationException:以下认证类型不存在接受:Microsoft.AspNet.Identity.Application

我已经追踪到这里的错误https://github.com/aspnet/HttpAbstractions/blob/dev/src/Microsoft.AspNet.PipelineCore/DefaultHttpResponse.cs

，但我似乎看不到SignInContext。可接受的名称正在被添加到SignInContext.

我正在使用在VS14 CTP2中使用的所有vnext库的Alpha-2版本

下面是我的Startup.cs

public void Configure(IBuilder app)
    {
        try {
            // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
            var configuration = new Configuration();
            configuration.AddJsonFile("config.json");
            configuration.AddEnvironmentVariables();
         //   app.UseLogRequests("try");
            app.UseErrorPage(ErrorPageOptions.ShowAll);
            app.UseServices(services =>
            {
                services.AddIdentity<MyUser>()
                .AddMongoDB<MyUser>(configuration.Get("Data:MongoIdentity:ConnectionString"), configuration.Get("Data:MongoIdentity:DBName"))
                .AddHttpSignIn<MyUser>();

                // Add MVC services to the services container
                services.AddMvc();
            });
            // Add static files to the request pipeline
            app.UseStaticFiles();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller}/{action}/{id?}",
                    defaults: new { controller = "Home", action = "Index" });
                routes.MapRoute(
                    name: "api",
                    template: "api/{controller}/{action}",
                    defaults: new { action = "Index" });
            });
            // Add cookie-based authentication to the request pipeline
            app.UseCookieAuthentication(new CookieAuthenticationOptions
            {
                AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
                LoginPath = new PathString("/Account/Login"),
            });
        }
        catch (Exception ex)
        {
            Console.Write(ex.ToString());
            throw;
        }
    }