index.js

// Old code

const findProtostarSubids = async (item, callback) => {
  async.waterfall([
    (cb) => {
      matchSubid(item)
        .then((res) => {
          cb(null, res);
        }).catch((err) => {
          cb(err)
        });
    },
  ], (err, result) => {
    if (err) {
      console.log(err)
    }
    callback(err, result);
  });
};


// New code 
const findProtostarSubids = async (item) => {
  let results = await matchSubid(item).catch(e => {
    throw (e)
  });
  return (results);
};