Fetch anyone whoever approved a token to an address

fetchApprovals.js

const { program } = require("commander");
const fetch = require('node-fetch');
//const fs = require('fs');
//const outFile = "users.txt";
const urlRoot = 'https://api.etherscan.io/api?module=logs&action=getLogs&';


const fetchApprovals = async (
    startBlock,
    token,
    target,
    apiKey
) => {
    const suffix= `topic0=0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925&topic2=0x000000000000000000000000${target.slice(2)}`
    const query = `${urlRoot}fromBlock=${startBlock}&toBlock=latest&address=${token}&${suffix}&apikey=${apiKey}`

    const resp = await fetch(query);
    const data = await resp.json();

    let users = new Set();
    data["result"].forEach((approval) => {
        const topics = approval['topics'];
        users.add(topics[1].slice(26));
    });
    
    //fs.writeFile(outFile, JSON.stringify([...users]), (err) => {});
    console.log(users);
};

const main = async () => {
    program
      .argument("<token>", "ERC20 token")
      .argument("<target>", "Target Contract")
      .argument("<apikey>", "Etherscan Api Key")
      .option("--block <block>", "Starting Block", 379224)
      .action(async (token, target, apiKey, options) => {

        await fetchApprovals(
            options.block,
            token,
            target,
            apiKey
        );
      });
    program.parseAsync();
};


main().catch((e) => console.error(e.toString()));