00022.Lambda getCsvFromS3ToJson

import { S3Client,  GetObjectCommand } from '@aws-sdk/client-s3';
const s3 = new S3Client({region: process.env.REGION});
import csv from 'csvtojson'

export const handler = async (event) => {
    
    try {
      const command = new GetObjectCommand({
        Bucket: process.env.S3_BUCKET_NAME,
        Key: process.env.S3_OBJECTKEY
      });
      
      const s3Obj = await getS3Object(command);

       for (let i = 0; i < s3Obj.length; i++) {
           console.log(`UserName: [${s3Obj[i].username}].`);
       }
        return { statusCode: 200, body: {aaa: XXXX, bbb: XXXX} };
       
    } catch (error) {
        if (error.name && error.name == 'XXXX') {
        }
        console.error(error);
        return { statusCode: 500, body: {aaa: XXXX, bbb: XXXX} };
    }
  }
    
  async function getS3Object(command) {
       try {
           const response = await s3.send(command);
           const stringRes = await response.Body.transformToString('utf-8');
           const json = csv().fromString(stringRes);
           return json;
       } catch (e) {
           throw new Error((JSON.stringify({aaa: XXXX, bbb: XXXX})));
       }
  }