Getting invalid_request for Youtube Analytics with nodejs library - node.js

Question

I am trying to setup nodejs with youtube analytics api. I am currently using a refresh token to try and get access tokens. It works great when using postman but I can't seem to replicate the functionality in nodejs and get a 400: invalid_request with no additional information provided.
Here is my code
var google = require('googleapis');
var OAuth2 = google.auth.OAuth2;
var oAuthClient = new OAuth2();
// Retrieve tokens via token exchange explained above or set them:
oAuthClient.setCredentials({
access_token: "",
refresh_token: process.env["YOUTUBE_ANALYTICS_REFRESHTOKEN"]
});
var youtubeAnalytics = google.youtubeAnalytics({
version: 'v1', auth: oAuthClient
});
var moduleExports = {
retrieveDailyBreakdownViews : function(){
var query = {
ids: 'channel==' + {channelID here},
'start-date': '2017-05-01',
'end-date': '2017-05-02',
metrics: 'views,estimatedMinutesWatched',
dimensions: 'insightPlaybackLocationType',
sort: 'views'
}
youtubeAnalytics.reports.query(query, (error, response) => {
console.log(error);
console.log(response);
});
}
}
module.exports = moduleExports;
Any ideas? If this doesn't work I can just try and build the query through HTTP/REST but I'd prefer to use the SDK.

Answer 1

In order to be able to refresh the access token, you will also need the client_id and client_secret. What's happening under the hood is the following request to refresh the token (referenced here):
POST https://accounts.google.com/o/oauth2/token
{
refresh_token: refresh_token,
client_id: this._clientId,
client_secret: this._clientSecret,
grant_type: 'refresh_token'
}
You'll need to initialize your Oauth2 client with :
var oAuthClient = new OAuth2(
YOUR_CLIENT_ID,
YOUR_CLIENT_SECRET,
YOUR_REDIRECT_URL
);
You'll also need to provide a refresh token that was generated using the same client_id / client_secret if you hardcode the refresh token value

Answer 2

This is what I ended up doing to fix the issue
var google = require('googleapis');
var googleAuth = require('google-auth-library');
var auth = new googleAuth();
var oauth2Client = new auth.OAuth2(process.env["YOUTUBE_CLIENT_ID"],
process.env["YOUTUBE_CLIENT_SECRET"]);
oauth2Client.credentials.refresh_token =
process.env["YOUTUBE_ANALYTICS_REFRESHTOKEN"];
var youtubeAnalytics = google.youtubeAnalytics({
version: 'v1'
});
I then make my calls like this:
youtubeAnalytics.reports.query(query, (error, response) => {})