Read text file in AWS S3 using Nodejs~

index.js

const s3 = require('aws-sdk/clients/s3');  // npm install aws-sdk

async function readFile() {
    try {
        var s3Data = await readTxtFile();
        console.log(s3Data);
    } catch (err) {
        console.log('Error:', err);
    }
}

const readTxtFile = () => {
    return new Promise(function (resolve, reject) {
        var s3Bkt = new s3({ accessKeyId: process.env.ACCESS_KEY_ID, secretAccessKey: process.env.SECRET_ACCESS_KEY });
        // var s3Bkt = new s3(); 
        var params = { Bucket: process.env.BUCKET_NAME, Key: 'file.txt' };
        s3Bkt.getObject(params, function (err, data) {
            if (err) {
                reject(err.message);
            } else {
                var data = Buffer.from(data.Body).toString('utf8');
                resolve(data);
            }
        });
    });
}

readFile();