class Google::Auth::UserRefreshCredentials

def initialize options = {}
  options ||= {}
  options[:token_credential_uri] ||= TOKEN_CRED_URI
  options[:authorization_uri] ||= AUTHORIZATION_URI
  @project_id = options[:project_id]
  @project_id ||= CredentialsLoader.load_gcloud_project_id
  @quota_project_id = options[:quota_project_id]
  super options
end