FA2 balance_of request in Node.js

balanceOf.js

const TezosToolkit = require('@taquito/taquito')
const compose = require('@taquito/taquito');
const tzip12 = require('@taquito/tzip12'); 
const Tzip12Module = require('@taquito/tzip12'); 
const tzip16 = require('@taquito/tzip16');
const Tzip16Module = require('@taquito/tzip16');
const importKey = require('@taquito/signer').importKey;

const Tezos = new TezosToolkit.TezosToolkit("https://mainnet-tezos.giganode.io");

Tezos.addExtension(new Tzip12Module.Tzip12Module());
Tezos.addExtension(new Tzip16Module.Tzip16Module());

const FA2 = "KT1TBaU9Jz3DnZAifL9pcW4g3EvH9WpNFyo1";
const TokenHolder = "tz1P7LT36ZnP2iKYSjNF2Za2Tiuj1b7EPP2G";

const getFa2 = async () => {
    return Tezos.contract.at(FA2, compose.compose(tzip16.tzip16, tzip12.tzip12));
};

const toJSON = (x) => JSON.parse(JSON.stringify(x));

const main = async () => {
  // Import Alice's key so you have a signer
  await importKey(Tezos, 'edsk3QoqBuvdamxouPhin7swCvkQNgq4jP5KZPbwWNnwdZpSpJiEbq');

  let c = await getFa2();

  // Get `balance_of`
  let a = {
    owner: TokenHolder,
    token_id: '2'
  };
  let balance_of = await c.views.balance_of([a]).read();
  balance_of = toJSON(balance_of);

  console.log('balance_of =>', balance_of);
};

main();

package.json

{
  "name": "fa2-test",
  "version": "1.0.0",
  "description": "",
  "main": "fa2.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node balanceOf.js"
  },
  "keywords": [
    "Tezos"
  ],
  "author": "[email protected]",
  "license": "MIT",
  "dependencies": {
    "@taquito/beacon-wallet": "^9.2.0",
    "@taquito/signer": "^9.2.0",
    "@taquito/taquito": "^9.2.0",
    "@taquito/tzip12": "^9.2.0",
    "@taquito/tzip16": "^9.2.0"
  }
}