Google App Script - Extract event from calendar to Google Spreadsheet automatically

Code.gs

var calendarId = 'xxxx@group.calendar.google.com'; 
var startDate = "2020-01-01"; 
var stopDate = "2020-12-31"; 

// Add element to menu to force the trigger
function addMenu() {
  var ui = SpreadsheetApp.getUi()
  var menu = ui.createMenu("Menu AddOn").addItem("Extract Calendar", "extractFromCalendar").addToUi()
}

// extract data from the calendar
function extractFromCalendar() {
  var activeSheet = SpreadsheetApp.getActiveSheet(); 
  var start = new Date(startDate);
  var stop = new Date(stopDate);
  
  var calendar = CalendarApp.getCalendarById(calendarId);
 
  // clean range
  activeSheet.getRange("A:D").setValue("");

  // populate with the extracted data
  var row = 2; 
  calendar.getEvents(start, stop).forEach(event => {
     activeSheet.getRange(row, 1).setValue(event.getCreators().pop());
     activeSheet.getRange(row, 2).setValue(event.getStartTime());
     activeSheet.getRange(row, 3).setValue(event.getEndTime());
     activeSheet.getRange(row, 4).setValue(event.getTitle());
     row++; 
   });
}