从FCM

Question

  

Google.Apis.Http.Configurable MessageHandler.d__59.MoveNext（）---从上一次引发异常的位置开始的堆栈跟踪---
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）位于
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务），位于
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务），位于System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd（任务任务），位于
   Google.Apis.Auth.OAuth2.Requests.TokenRequestExtenstions.d__0.MoveNext（）的System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult（）-从上次引发异常的位置开始的堆栈跟踪-

它在一台服务器上运行正常，但不能与另一台服务器上运行

private static async Task<string> GetAccessToken()
{
  //var buildDir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
  string token = string.Empty;
  try
  {
    List<string> scope = new List<string>();
    scope.Add(firebaseMessagingURL); //Will Not Change --Until or unless changes by google 
    GoogleCredential googlCredentail = GoogleCredential.FromJson(firebasecredential).CreateScoped(scope);
    token = await googlCredentail.UnderlyingCredential.GetAccessTokenForRequestAsync();
    return token;
  }
  catch (Exception ex)
  {
    Logging.WriteLog(ex, Logging.LogMsgType.General, Logging.CacheStoresName.Empty.ToString());
  }
  return token;
}