How to fix error: "Google.Apis.Auth: At least one client secrets (Installed or Web) should be set " for YouTubeAPI - .net-core

Question

I have created an HTTP trigger azure function, which holds the code (below) to upload a video to YouTube automatically. Source: (https://developers.google.com/youtube/v3/docs/videos/insert).
When I try to run the app locally using visual studio, I am getting the following error:
Executed 'Function1' (Failed, Id=d601d64a-2f2c-4f8a-8053-a2f33ca21dbc)
System.Private.CoreLib: Exception while executing function: Function1.
Google.Apis.Auth: At least one client secrets (Installed or Web)
should be set
It looks like a Google Authentication error, but I am unsure as to how to get this fixed and I see that YouTube API does not support Service account? How can this issue be fixed, is there a get around to this? Thanks in advance.
C# Code:
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Google.Apis.Auth.OAuth2;
using Google.Apis.Upload;
using Google.Apis.YouTube.v3.Data;
using System.Reflection;
using Google.Apis.YouTube.v3;
using Google.Apis.Services;
using System.Threading;
namespace UploadVideo
{
public static class Function1
{
[FunctionName("Function1")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
log.LogInformation("YouTube Data API: Upload Video");
log.LogInformation("==============================");
try
{
await Run();
}
catch (AggregateException ex)
{
foreach (var e in ex.InnerExceptions)
{
log.LogInformation("Error: " + e.Message);
}
}
return new OkObjectResult($"Video Processed..");
}
private static async Task Run()
{
UserCredential credential;
using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))
{
credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
// This OAuth 2.0 access scope allows an application to upload files to the
// authenticated user's YouTube channel, but doesn't allow other types of access.
new[] { YouTubeService.Scope.YoutubeUpload },
"user",
CancellationToken.None
);
}
var youtubeService = new YouTubeService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = Assembly.GetExecutingAssembly().GetName().Name
});
var video = new Video();
video.Snippet = new VideoSnippet();
video.Snippet.Title = "Default Video Title";
video.Snippet.Description = "Default Video Description";
video.Snippet.Tags = new string[] { "tag1", "tag2" };
video.Snippet.CategoryId = "22"; // See https://developers.google.com/youtube/v3/docs/videoCategories/list
video.Status = new VideoStatus();
video.Status.PrivacyStatus = "unlisted"; // or "private" or "public"
var filePath = #"C:\Users\Peter\Desktop\audio\test.mp4"; // Replace with path to actual movie file.
using (var fileStream = new FileStream(filePath, FileMode.Open))
{
var videosInsertRequest = youtubeService.Videos.Insert(video, "snippet,status", fileStream, "video/*");
videosInsertRequest.ProgressChanged += videosInsertRequest_ProgressChanged;
videosInsertRequest.ResponseReceived += videosInsertRequest_ResponseReceived;
await videosInsertRequest.UploadAsync();
}
}
private static void videosInsertRequest_ProgressChanged(Google.Apis.Upload.IUploadProgress progress)
{
switch (progress.Status)
{
case UploadStatus.Uploading:
Console.WriteLine("{0} bytes sent.", progress.BytesSent);
break;
case UploadStatus.Failed:
Console.WriteLine("An error prevented the upload from completing.\n{0}", progress.Exception);
break;
}
}
private static void videosInsertRequest_ResponseReceived(Video video)
{
Console.WriteLine("Video id '{0}' was successfully uploaded.", video.Id);
}
}
}

Answer 1

It looks like you were trying to use the service account to do the OAuth2 web server flow, which wont work. The correct code form creating a service account credential is as follows.
GoogleCredential credential;
using (var stream = new FileStream(serviceAccountCredentialFilePath, FileMode.Open, FileAccess.Read))
{
credential = GoogleCredential.FromStream(stream)
.CreateScoped(scopes);
}
Note
as i have mentioned in your other questions the YouTube API does NOT support service account authentication. You must use Oauth2 and i am not convinced this can be done inside of azure functions. As there is no way to spawn the web browser window to request authorization of the user.