git clone https://github.com/aksel/s3-fileupload.git
Under the tab 'Security credentials', you can find the user's access keys.
As an example
"scripts": {
"start": "cross-env NODE_ENV=development BUCKET=some_fileupload_bucket ACCESS_KEY_ID=accessKey123421 SECRET_ACCESS_KEY=secretKey21390321 node ./src/server.js"
}