客户未经授权使用此方法检索访问令牌Gmail API C＃
当我尝试使用服务帐户授权gmail api时，我收到以下错误
“客户端未经授权使用此方法检索访问令牌”
static async Task MainAsync() { sstageEntities db = new sstageEntities(); //UserCredential credential; Dictionary dictionary = new Dictionary(); String serviceAccountEmail = "xxx.iam.gserviceaccount.com"; var certificate = new X509Certificate2( AppDomain.CurrentDomain.BaseDirectory + "xxx-8c7a4169631a.p12", "notasecret", X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.Exportable); //string userEmail = "user@domainhere.com.au"; ServiceAccountCredential credential = new ServiceAccountCredential( new ServiceAccountCredential.Initializer(serviceAccountEmail) { User = "xxx@xxx.com", Scopes = new[] { "https://mail.google.com/" } }.FromCertificate(certificate) ); // Create Gmail API service. var gmailService = new GmailService(new BaseClientService.Initializer() { HttpClientInitializer = credential, ApplicationName = ApplicationName, }); // Define parameters of request. var emailListRequest = gmailService.Users.Messages.List("xxx@xxx.com"); emailListRequest.LabelIds = "INBOX"; emailListRequest.IncludeSpamTrash = true; emailListRequest.Q = "from:bpm@xxx.co.in is:unread"; //Get our emails var emailListResponse = await emailListRequest.ExecuteAsync(); 我正在使用创建服务帐户时获得的p12键。但是当我运行我的控制台应用程序时，会发生以下错误。任何帮助都将非常感激。
提前致谢 ！
服务帐户需要获得授权，或者无法访问域的电子邮件。
“客户未经授权使用此方法检索访问令牌”
表示您未正确授权它检查将域范围的权限委派给服务帐户