Csharp 用于请求用户返回列表的C#Google API

几天来，我一直在寻找这方面的信息.我相信我已经为访问正确设置了与API相关的所有内容，但我一直收到这个错误: 服务管理员引发了异常.

HttpStatusCode is BadRequest.
Google.Apis.Requests.RequestError
Bad Request [400]
Errors [
        Message[Bad Request] Location[ - ] Reason[badRequest] Domain[global]
]

Google.GoogleApiException: The service admin has thrown an exception. HttpStatusCode is BadRequest. Bad Request
   at Google.Apis.Requests.ClientServiceRequest`1.ParseResponse(HttpResponseMessage response)
   at Google.Apis.Requests.ClientServiceRequest`1.ExecuteAsync(CancellationToken cancellationToken)
   at Google.Apis.Requests.ClientServiceRequest`1.ExecuteAsync()

我运行代码的方法:

string[] googleScopes = {DirectoryService.Scope.AdminDirectoryUser};
public async Task connectToGoogle()
        {
            try
            {
                GoogleCredential credential = GoogleCredential.FromFile(googleTokenPath).CreateScoped(googleScopes);//.CreateWithUser(googleAdminEmail);
                
                
                var service = new DirectoryService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credential,
                    ApplicationName = "TestAPIProject"
                });
                
                var request = service.Users.List();
                request.Customer = "test.example.com";
                request.Domain = "test.example.com";
                var result = await request.ExecuteAsync();
                
                
                Console.WriteLine(result);
                
            }
            catch (Exception e)
            {
                System.Console.WriteLine(e);
            }
        }

据我所知，JSON令牌在这方面是正确的.我认为问题出在客户或域名上，但我已经try 了很多不同的 Select ，仍然得到了Bad Request.

我正在使用Google Workspace服务帐户发送请求.确保使用该令牌，而不是OAuth令牌.