To be placed within .onAttach to auto load an authentication file from an environment variable.

gar_attach_auto_auth(required_scopes, environment_var = "GAR_AUTH_FILE")

## Arguments

required_scopes A character vector of minimum required scopes for this API library The name of the environment variable where the file path to the authentication file is kept This function works with gar_auto_auth. It is intended to be placed within the .onAttach hook so that it loads when you load your library. For auto-authentication to work, the environment variable needs to hold a file path to an existing auth file such as created via gar_auth or a JSON file file download from the Google API console.

## Value

Invisible, used for its side effects of calling auto-authentication.

Other authentication functions: gar_auth_service, gar_auth, gar_auto_auth, gar_gce_auth, get_google_token, token_exists

## Examples


# NOT RUN {
.onAttach <- function(libname, pkgname){