title: How to request user permission to read a file in GAS?
body: <p>I am working on a Google Apps Script add-on for Sheets which has been verified for the drive.file scope. At one point I need to read the parent folder of the current spreadsheet so I can create files in it. Is it possible to do this without having the drive.readonly scope? Could I request access from the user solely to that folder? If so, how would I do this?</p>