plt_handler_2.js

...

module.exports.checkAddress = (event, context, callback) => {
  console.log("CHECKING ADDRESS:", process.env.IOTA_ADDRESS);

  const searchValues = { addresses: [process.env.IOTA_ADDRESS]};
  iota.api.findTransactionObjects(searchValues, (err, res) => {
    if (err) {
      console.log("error finding transactions!", err);
      throw err;
    }

    console.log("found the transactionObjects:", res);
  });
};