Permissions API Call Failing when used in onOpen simple trigger - google-apps-script

Question

I've created a Google Sheet with an Apps Script to do issue and task tracking. One of the features I'm trying to implement is permissions based assigning of tasks. As a precursor to that, I have a hidden sheet populated with a list of users and their file permissions, using code similar to that in this StackOverflow question
When I manually run the code, it works fine. However, I want it to load every time the sheet is opened in case of new people entering the group or people leaving the group. So I made a call to my function in my onOpen simple trigger. However, when it is called via onOpen, I get the following:
GoogleJsonResponseException: API call to drive.permissions.list failed with error: Login Required
at getPermissionsList(MetaProject:382:33)
at onOpen(MetaProject:44:3)
Here are my functions:
My onOpen Simple Trigger:
function onOpen() {
//Constant Definitions for this function
const name_Access = 'ACCESS';
const row_header = 1;
const col_user = 1;
const col_level = 2;
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sht_Access = ss.getSheetByName(name_Access);
var ui = SpreadsheetApp.getUi();
ui.createMenu('MetaProject')
.addSubMenu(
ui.createMenu('View')
.addItem('Restore Default Sheet View', 'restoreDefaultView')
.addItem('Show All Sheets', 'showAllSheets')
)
.addSeparator()
.addToUi();
//Clear Contents, Leave Formatting
sht_Access.clearContents();
//Set Column Headers
var head_name = sht_Access.getRange(row_header,col_user);
var head_level = sht_Access.getRange(row_header,col_level);
head_name.setValue('User');
head_level.setValue('Level');
//Refresh User List for use in this instance
getPermissionsList();
}
Here is getPermissionsList:
function getPermissionsList() {
const fileId = "<REDACTED>"; // ID of your shared drive
const name_Sheet = 'ACCESS';
const row_start = 2;
const col_user = 1;
const col_access = 2;
var ss = SpreadsheetApp.getActiveSpreadsheet();
var thissheet = ss.getSheetByName(name_Sheet);
// THIS IS IMPORTANT! The default value is false, so the call won't
// work with shared drives unless you change this via optional arguments
const args = {
supportsAllDrives: true
};
// Use advanced service to get the permissions list for the shared drive
let pList = Drive.Permissions.list(fileId, args);
//Put email and role in an array
let editors = pList.items;
for (var i = 0; i < editors.length; i++) {
let email = editors[i].emailAddress;
let role = editors[i].role;
//Populate columns with users and access levels / role
thissheet.getRange(row_start + i,col_user).setValue(email);
thissheet.getRange(row_start + i,col_access).setValue(role);
}

Answer 1

I searched before I posted and I found the answer via some related questions in the comments, but I didn't see one with an actual answer. The answer is, you cannot call for Permissions or anything requiring authorization from a Simple Trigger. You have to do an Installable trigger.
In order to do that do the following:
Create your function or rename it something other than "onOpen".
NOTE: If you name it onOpen (as I originally did and posted in this answer) it WILL work, but you will actually run TWO triggers - both the installable trigger AND the simple trigger. The simple trigger will generate an error log, so a different name is recommended.
Click the clock (Triggers) icon on the left hand side in Apps Script.
Click "+ Add Trigger" in the lower right
Select the name of your function for "which function to run"
Select "onOpen" for "select event type"
Click "Save".
The exact same code I have above now runs fine.