Sample Auth implementations

Setup

1. Setup and launch ngrok on port 3000 to create an HTTPS redirect URI, set this URI as REDIRECT_URI in the Dockerfile for the implementation you intend to run.
2. Input your application CLIENT_ID and CLIENT_SECRET into the same Dockerfile.
3. Launch the example implementation with docker build --tag auth-sample ./[language] && docker run auth-sample
   e.g: docker build --tag auth-sample ./go && docker run -it -p 3000:3000 auth-sample
4. Connect to either your REDIRECT_URI or localhost:3000 to start a journey.