Domitai Node API Auth

const auth = () => {
  let token;
  if (secrets.length > 0) {
    const idx = Math.floor(Math.random() * secrets.length);
    token = jwt.sign({ key: secrets[idx].API_KEY, nonce: moment().valueOf() }, secrets[idx].API_SECRET);
  } else {
    token = jwt.sign({ key: API_KEY, nonce: moment().valueOf() }, API_SECRET);
  }
  return { 'Authorization': `bearer ${token}`, 'Content-Type': 'application/json' };
};