@Override
  public URL getApiRoute(String apiRouteBase) throws MalformedURLException {
    return new URL(apiRouteBase);
  }
The request did not error, meaning that the registry does not require authentication.

@param response ignored
@return {@link Optional#empty()}
jib-core/src/main/java/com/google/cloud/tools/jib/registry/AuthenticationMethodRetriever.java