MS Graphでテナントのライセンスを取得

// GraphServiceClientの作成(Credentialの作成方法は省略)
var cli = new GraphServiceClient(cred);
// 契約しているライセンス情報一覧の取得
var lic = await cli.SubscribedSkus.GetAsync();

GraphServiceClient cli = new GraphServiceClient(cred);
var lic = await cli.SubscribedSkus.GetAsync();
if (lic == null) {
    Console.WriteLine("Get License Fail");
    return;
}
if (lic.Value == null) {
    Console.WriteLine("Get License Fail");
    return;
}
foreach(var itm in lic.Value) {
    int all = (int)itm.PrepaidUnits.Enabled!;
    int use = (int)itm.ConsumedUnits!;
    Console.WriteLine($"{itm.SkuPartNumber},{all},{use},{all-use}");
}
/* 実行例
STREAM,XXXX,YY,MMMM
Dynamics_365_Sales_Premium_Viral_Trial,XXXX,YY,ZZZZ
WINDOWS_STORE,XXXX,Y,ZZZZ
ENTERPRISEPACK,XX,YY,ZZ
FLOW_FREE,XXXX,YY,ZZZZ
MICROSOFT_BUSINESS_CENTER,XXXX,Y,ZZZZ
POWERAPPS_VIRAL,XXXX,Y,ZZZZ
EXCHANGESTANDARD,XXX,YY,ZZ
POWER_BI_STANDARD,XXXX,Y,ZZZZ
OFFICESUBSCRIPTION,XXX,YYY,ZZ
Power_Pages_vTrial_for_Makers,XXXX,Y,ZZZZ
STANDARDPACK,XXX,YYY,ZZ
*/