title: How to change an existing Google Form element using Google Apps Script when the form initially loads
body: <p>I have an existing Google Form which is manually created, i.e. by adding form elements using the GUI. There is a dropdown field called "Team Member ID Number" as shown below. </p>
  
  <p><a href="https://i.stack.imgur.com/0p4hd.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0p4hd.jpg" alt="enter image description here"></a></p>
  
  <p>What I need is to pull those ids of the team members from a spreadsheet when the form loads. </p>
  
  <p>I know how to pull data from a spreadsheet using Google Apps Script. I just don't know how I can make any change to an existing Google Form field using Apps Script. I want to display those ids, coming from outside (spreadsheet), in that dropdown. Any idea how I can accomplish that? </p>