Not sure what's wrong with my code, trying to write GCS XML files to Google Sheets

Hey all, I'm trying to use node.js to write a cloud function in Google Cloud Platform, that basically writes data from a storage bucket to Google Sheets. I found examples online and it works perfectly, however, this is with CSV files. I want to edit the code to be able to do XML as well and I have done my best but it isn't working. Can someone have a look over and let me know what I'm potentially doing wrong? Here is the code

Submitted February 08, 2019 at 11:32AM by arkie