Converting Excel to Gsheet and then importrange them without needing Auth - google-apps-script

Question

I receive files in .xlsx which is updated about daily. To use the importrange function I need to have the xlsx file converted to gSheet. I've completed the conversion as per drive API
function importXLS(){
var folderBId = "redacted"; // This is the folder where we will save the gsheet converted files
fileID = SpreadsheetApp.getActiveSpreadsheet().getRangeByName("DataFile").getValue();
var xFile = DriveApp.getFileById(fileID);
var name = xFile.getName();
if (name.indexOf('.xlsx')>-1){
var ID = xFile.getId();
var xBlob = xFile.getBlob();
var newFile = {
title : name+'_converted',
parents: [{id: folderBId}] // Added
};
file = Drive.Files.insert(newFile, xBlob, {
convert: true
});
SpreadsheetApp.getActiveSpreadsheet().getRangeByName("GDatafile").setValue(file.id); // **Notes below**
// Drive.Files.remove(ID); // Added // If this line is run, the original XLSX file is removed. So please be careful this.
}
So I save the new gSheet ID in my spreadsheet so I can use importrange to import it. But because it's a new gsheet file for every update, and not an overwritten version of the old one, I need to explicitly give access to the file. The point here is to automate, and having to click "allow" for every time you access it is not ideal.
Can I somehow (since I have the fileID at my disposal here anyway, and the spreadsheet that will want to access it) allow access right there? Or is there a way that I can set up this 'converting' code to overwrite the old gsheet (so that I only have to allow access once).

Answer 1

This worked for me:
function importXLS(){
var folderBId = "redacted"; // This is the folder where we will save the gsheet converted files
fileID = SpreadsheetApp.getActiveSpreadsheet().getRangeByName("DataFile").getValue();
var xFile = DriveApp.getFileById(fileID);
var name = xFile.getName();
if (name.indexOf('.xlsx')>-1){
var ID = xFile.getId();
var xBlob = xFile.getBlob();
var newFile = {
title : name+'_gsheet',
parents: [{id: folderBId}]
};
var GDataFile = SpreadsheetApp.getActiveSpreadsheet().getRangeByName("GDatafile").getValue();
if (GDataFile == "" ){
file = Drive.Files.insert(newFile, xBlob, {
convert: true
})
Logger.log("New File Created: " + file.id);
SpreadsheetApp.getActiveSpreadsheet().getRangeByName("GDatafile").setValue(file.id);
}
else{
file = Drive.Files.update(newFile,GDataFile,xBlob); // <--- this is the update code
Logger.log("File in theory updated... " + GDataFile);
}
// Drive.Files.remove(ID); // Added // If this line is run, the original XLSX file is removed. So please be careful this.
}
}