Google Analytics（分析）报告授权服务帐户

Question

我正在尝试使用Google Analytics（分析）API使用服务帐户在ac＃webapp中报告用户信息。

我已经下载了JWT文件并将其链接到项目中。我在尝试验证服务帐户时遇到问题：当我调用RequestAccessTokenAsync(cancellationToken)anc引发异常时，说作用域一定不能为空值，因为我是serviceAccountCredential根据json流创建的，所以我无法设置作用域。

一种替代方法是使用来请求访问令牌，serviceAccountCredential.GetAccessTokenForRequestAsync(serviceAccountCredential.TokenServerUrl)但是在那种情况下，我不了解如何向报告请求提供该令牌，如果没有该令牌，API调用将不会被授权，并且将失败。

这是源代码：

string viewId = "VIEW_ID";      

FileStream jwtSecretStream = new FileStream(@"path\to\servicesecret.json", FileMode.Open, FileAccess.Read);

var metrics = new List<Metric> { new Metric { Expression = "ga:users" } };

var dimensions = new List<Dimension> { new Dimension { Name = "ga:userType" } };

DateRange dateRange = new DateRange

{

     StartDate = DateTime.UtcNow.AddDays(-7).ToString("yyyy-MM-dd"),

     EndDate = DateTime.UtcNow.ToString("yyyy-MM-dd")

};

try

{

     serviceAccountCredential = ServiceAccountCredential.FromServiceAccountData(jwtSecretStream);

     // this call will throw the exception

     var x = await serviceAccountCredential.RequestAccessTokenAsync(CancellationToken.None); 

    //this call will return a valid token -> DON'T KNOW HOW TO PASS To THE REQUEST

    //var y = await serviceAccountCredential.GetAccessTokenForRequestAsync(serviceAccountCredential.TokenServerUrl); 

}

catch (Exception e)

{

    throw;

}

_analyticsReportingService = new AnalyticsReportingService(new AnalyticsReportingService.Initializer()

{

    HttpClientInitializer = serviceAccountCredential,

    //HttpClientInitializer = credential,

    ApplicationName = "TestAnalytics",

});

//If I execute the request I got UNAUTHORIZED because there's not a valid access token  

var response = _analyticsReportingService.Reports.BatchGet(getReportRequest).Execute();

如何为服务帐户提供有效范围，或者如何请求访问令牌并将其放入批处理需求中？