How to use the nconf.load function in nconf

function loadConf() {
    try {
        nconf.load(function (err) {
            if (err) {
                logger.warn("Conf load error:" + err.message);
                return;
            }
        });
    } catch (err) {
        // This will not catch the throw!
        logger.error("Global conf load issue !");
        logger.error(err);
        return;
    }
}
function getConf(){

if (key && value !== null) {
      if (value === '') {
        program.log.debug('Clearing key', key);
        nconf.clear(key);
      } else {
        program.log.debug('Setting key', key, 'to', value);
        nconf.set(key, value);
      }
      nconf.save();
      console.log(nconf.save());
    } else if (key) {
      program.log.debug('Retrieving key', key);
      console.log(nconf.get(key));
    } else {
      program.log.debug('Listing all kay-values');
      console.log(nconf.load());
    }
  }

function readConfig(settingKey) {
    nconf.load()
    return nconf.get(settingKey)
}

export function configLoad() {
    nconf.load();
}