default Locale localeConvert(String languageTag) {
        if (languageTag == null) {
            return null;
        }
        return new Locale.Builder().setLanguageTag(languageTag).build();
    }
@author Marc Savy {@literal <marc@blackparrotlabs.io>}
manager/api/beans/src/main/java/io/apiman/manager/api/beans/idm/UserMapper.java