Required scopes needed to authenticate - needs to match at least one

Name of environment var that contains auth file path

The authentication file can be a .httr-oauth file created via gar_auth or a Google service JSON file downloaded from the Google API credential console, with file extension .json.

You can use this in your code to authenticate from a file location specified in file, but it is mainly intended to be called on package load via gar_attach_auto_auth.

environment_var This is the name that will be called via Sys.getenv on library load. The environment variable will contain an absolute file path to the location of an authentication file.