如何在iOS 13中使用Xamarin获取设备令牌？

Firebase.Core.App.Configure();

if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
    UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
    UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound | UNAuthorizationOptions.Badge, (granted, error) =>
    {
        Console.WriteLine("granted: " + granted);
    });
}

UIApplication.SharedApplication.RegisterForRemoteNotifications();

public override void DidRegisterForRemoteNotifications(UNUserNotificationCenter center, NSData deviceToken, NSError error)
{
    var token = deviceToken.Description.Trim('<', '>').Replace(" ", "");
    Console.WriteLine("Device Token: " + token);
}