Google Drive API in UWP

I looked for a solution in Google about using Google Drive API in UWP.
I saw this article, and the accepted solution is short – doesn’t work as it is in UWP apps.

I tried to create a new class and it did work.

//StorageFile tempfile = Credentials location
var credential = GoogleCredential.FromFile(tempfile.Path)
.CreateScoped(new[] { DriveService.ScopeConstants.DriveFile });

var service = new DriveService(new BaseClientService.Initializer()
{
    HttpClientInitializer = credential,
    ApplicationName = "App name"
});

after that, I could use Drive API to upload and download. All I needed to do – was make everything as Task.

For example –

using (var stream = tempfile.OpenStreamForReadAsync().Result)
{
    var request = service.Files.Create(fileMetadata, stream, "application/octet-stream");
    request.Upload();

    var uploadedFile = request.ResponseBody;
    Debug.WriteLine($"File uploaded: {uploadedFile.Name} ({uploadedFile.Id})");
}

I used .Result and .AsTask().Wait() instead of await and AsTask().Result in any function.
Did it work only in debug? or now it supports?

sorry about my English