Goth.Config is a GenServer that holds the current configuration. This configuration is loaded from one of three places:

1. a JSON string passed in via your application’s config
2. a ENV variable passed in via your application’s config
3. The Application Default Credentials, as defined by https://developers.google.com/identity/protocols/application-default-credentials

The Goth.Config server exists mostly for other parts of your application (or other libraries) to pull the current configuration state, via Goth.Config.get/1. If necessary, you can also set config values via Goth.Config.set/2