class Google::Auth::GCECredentials

def build_token_hash body, content_type, retrieval_time
  hash =
    if ["text/html", "application/text"].include? content_type
      parse_encoded_token body
    else
      Signet::OAuth2.parse_credentials body, content_type
    end
  add_universe_domain_to hash
  adjust_for_stale_expires_in hash, retrieval_time
  hash
end