实现Google Open ID Connect的正确方法是什么。净核心2.1?

我正在努力学习ASP。NET核心身份验证选项,请遵循Pluralsight培训。在培训中,他们使用Azure进行身份验证。

我想用谷歌。下面是添加Google Auth的代码:

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddAuthentication(options =>
        {
            options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
            options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
        })
        .AddOpenIdConnect(options =>
        {
            _configuration.Bind("Google", options);
        })
        .AddCookie();

        services.AddSingleton<IGreeter, Greeter>(); // Dependency Injection for custom service Greeter
        services.AddDbContext<OdeToFoodDbContext>(options => options.UseSqlServer(_configuration.GetConnectionString("OdeToFood")));
        services.AddScoped<IRestaurantData, SqlRestaurantData>(); // scoped to http transaction, dbcontext is not thread safe
        services.AddMvc();
    }

在应用程序设置中。我定义了这些:

{
    "Google": {
        "ClientId": "234092845903-n92krp955lrp46mdf445g5vo0sqp2eks.apps.googleusercontent.com",
        "ClientSecret": "bRg1flFud87hfsef89jMKoGW"
    },
    "Greeting":  "Hello from appsettings.json !!",
    "ConnectionStrings": {
        "OdeToFood": "Server=(localdb)\\MSSQLLocalDB;Database=OdeToFood;Trusted_Connection=True;MultipleActiveResultSets=true"
    }
}

然而,当我运行应用程序时,我得到的不是谷歌登录屏幕,而是一个错误:

处理请求时发生未经处理的异常。 InvalidOperationException:向OpenIdConnectOptions提供权限、元数据地址、配置或配置管理器 微软AspNetCore。认证。OpenIdConnect。OpenIdConnectOptions。验证()

InvalidOperationException:向OpenIdConnectOptions提供权限、元数据地址、配置或配置管理器 微软AspNetCore。认证。OpenIdConnect。OpenIdConnectOptions。验证() 微软AspNetCore。认证。RemoteAuthenticationOptions。验证(字符串方案) 微软AspNetCore。认证。AuthenticationHandler。InitializeAsync(AuthenticationScheme,HttpContext上下文) 微软AspNetCore。认证。AuthenticationHandlerProvider。GetHandlerAsync(HttpContext上下文,字符串身份验证方案) 微软AspNetCore。认证。认证中间件。调用(HttpContext上下文) 微软AspNetCore。静态文件。静态文件中间件。调用(HttpContext上下文) 微软AspNetCore。诊断学。developerCeptionPageMiddleware。调用(HttpContext上下文)

我做错了什么?

ClientID和ClientSecret是在Google开发者控制台中定义的。