Google Sheets - post DATE and USERNAME who edited it - google-apps-script

Question

This code works on Google Sheets as to:
Help users update today's date in a column, and effectively add a signature.
In a specific column, users type in any random jibberish (easy to do), and the sheet will then change this to today's date, and add their logged-in email address as a signature.
Ps the sheet does know who's currently logged in - I've set the sheet so users do have to be logged in and given access to the sheet
This is my code (https://imgur.com/8KSBbsB):
function onEdit(event)
{
var timezone = "UTC";
var timestamp_format = "d/MM/yy"; // Timestamp Format.
var updateColName = "[code]";
var timeStampColName = "[code]";
var nameColname = "[codename]";
var userName = Session.getEffectiveUser().getEmail();
var sheet = event.source.getSheetByName('Rank Sheet'); //Name of the sheet where you want to run this script.
var actRng = event.source.getActiveRange();
var editColumn = actRng.getColumn();
var index = actRng.getRowIndex();
var headers = sheet.getRange(1, 1, 1, sheet.getLastColumn()).getValues();
var dateCol = headers[0].indexOf(timeStampColName);
var nameCol = headers [0].indexOf(nameColname); nameColname = nameColname+1;
var updateCol = headers[0].indexOf(updateColName); updateCol = updateCol+1;
if (dateCol > -1 && index > 1 && editColumn == updateCol) { // only timestamp if 'Last Updated' header exists, but not in the header row itself!
var cell = sheet.getRange(index, dateCol + 1);
var date = Utilities.formatDate(new Date(), timezone, timestamp_format);
cell.setValue(date + " " +userName)
var cell = sheet.getRange(index, nameColname + 1);
var nameCol = cell.setValue = (userName)
}
}
To do this you need to 'title' the columns [code], and [codename] (changeable).
Thank you very much to Cooper for advice given!!

Answer 1

Try this:
cell.setValue(date + '\n' + userName)