Get Viewer Display Name using Extension Frontend Helix Token

Ok got it.

So if i’m not generating a token in the frontend as referenced in the code here:
Here it is recommended to use the client secret/extension secret to generate a 60 day api token:

So you are saying to use this method that I am currently using in my code & referenced here:

However, my getToken() method will return the helix token stored in the Authentication.js, but my requests are complaining about an Invalid token (401)

GET https://api.twitch.tv/helix/users?id=xxxxx 401