Debugging AWS node.js script in Bubble.io

Hello,

A previous developer has setup the script below in my Bubble app to retrieve files.
However it's not working anymore - getting the error message "syntax error invalid or unexpected token"

Would need help to debug it

Here is the script:
var AWS = require('aws-sdk');
var filename = "folder_name/filename.zip"
var credentials = {
accessKeyId: "****access_key_id****",
secretAccessKey : "****access_key_secret****"
};
AWS.config.update({credentials: credentials, region: "eu-west-3''});
var s3 = new AWS.S3();

var presignedGETURL = s3.getSignedUrl('getObject', {
Bucket: '****bucket_name****',
Key: filename,
Expires: 100
});
presignedGETURL;