Node.js script to read AWS Credentials from the CVS file that the AWS Console provides you. Baffling that they don't offer this by default...

CsvCredentialsProvider.mjs

import {promises as fs} from 'fs'; 
import os from 'os';
import { parse } from 'csv-parse/sync';

/**
 * Creates a credential provider to pass to S3Client which reads a credentials
 * CSV downloaded from the AWS console.
 * 
 * @param csvFile string path of the CSV file from AWS console. 
 * @returns a Provider<Credentials> to give to S3Client as the credentials option.
 */
export async function createProvider(csvFile) {
  const content = await fs.readFile(csvFile);
  // Parse the CSV content
  const records = parse(content, {
    columns: true
  });
  //console.log('cols', records)
  return {
    accessKeyId: records[records.length - 1]['Access key ID'],
    secretAccessKey: records[records.length - 1]['Secret access key']
  }
}

example.mjs

import {createProvider} from './CsvCredentialsProvider.mjs';

// Create an Amazon S3 service client object.
const s3Client = new SDK.S3Client({
  region: REGION,
  credentials: createProvider("new_user_credentials.csv")
});