class Google::Auth::Credentials

def update_from_filepath path, options
  verify_keyfile_exists! path
  json = JSON.parse ::File.read(path)
  json["scope"] ||= options[:scope]
  json["target_audience"] ||= options[:target_audience]
  @project_id ||= json["project_id"] || json["project"]
  @quota_project_id ||= json["quota_project_id"]
  @client = init_client json, options
end