Capture User Access Token Locally - Unity/C#

By server I mean start a temporary web server inside the game

A custom accounts system for your own game. Your can connects to your extenal accounts system on a public server (which you are trying to avoid having) and fetchs the linked twitch account access token and uses that.

The CLI starts a temporary web sever to capture oAuth codes for exchange for tokens

I was suggesting you could copy the proceedure not the code itself.

TLDR:

The primary ways to get a token into a game are

  • user copy pastes the token
  • you start a temporary web server to handle the oAuth steps
  • you run a server external to the game on the web to handle oAuth and pass the token into the game somehow (Theres a variety of methods that can work)