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我最近遇到此错误错误消息

我认为这是由于Google Oauth的这一变化:https://developers.googleblog.com/2016/08/modernizing-oauth-interactions-in-native-apps.html.

我正在使用Azure身份验证服务来验证我用Xamarin Forms(C#)编写的iOS应用程序.

代码请求Azure身份验证服务:

var window = UIKit.UIApplication.SharedApplication.KeyWindow;
var root = window.RootViewController;
if(root != null)
{
    var current = root;
    while(current.PresentedViewController != null)
    {
        current = current.PresentedViewController;
    }

    var user = await AzureService.Instance.Client.LoginAsync(window.RootViewController, MobileServiceAuthenticationProvider.Google, new Dictionary<string, string>() { { "access_type", "offline" } });
    return user;
}

URL请求是:

using(var client = new HttpClient())
{
    const string url = "https://www.googleapis.com/oauth2/v3/userinfo?alt=json&suppress_webview_warning=true";
    client.DefaultRequestHeaders.Add("Authorization", token);
    var json = client.GetStringAsync(url).Result;
    var profile = JsonConvert.DeserializeObject<GoogleUserProfile>(json);
    return profile;
}

但是它仍然显示错误:Google的Azure身份验证设置正确,因为我一直使用此设置超过一个月,直到最近.任何人都有同样的问题或任何想法如何解决这个问题？