devicecode.cs

  res.res = await app.AcquireTokenWithDeviceCodeAsync(scopes, string.Empty, 
    deviceCodeCallback =>
      {
        // This will print the message on the console which tells the user where to go sign-in using 
        // a separate browser and the code to enter once they sign in.
        // The AcquireTokenWithDeviceCodeAsync() method will poll the server after firing this
        // device code callback to look for the successful login of the user via that browser.
        // This background polling (whose interval and timeout data is also provided as fields in the 
        // deviceCodeCallback class) will occur until:
        // * The user has successfully logged in via browser and entered the proper code
        // * The timeout specified by the server for the lifetime of this code (typically ~15 minutes) has been reached
        // * The developing application calls the Cancel() method on a CancellationToken sent into the method.
        //   If this occurs, an OperationCanceledException will be thrown (see catch below for more details).
        UnityEngine.WSA.Application.InvokeOnAppThread(() =>
          {
              tempStatusText = deviceCodeCallback.Message;
              set = true;
          }, true);

        return Task.FromResult(0);

       }, 
      CancellationToken.None).ConfigureAwait(true);