Delay in between two calls (POST and GET) in Google Apps script - json

Question

My first request on StackOverflow! I really hope you can help me!
I want to create a process to automatize a data report from a system to a sheet; I thought I could use their API, apps script, and export the data on google sheets.
To do so, I need to run two calls on the API:
A POST call, which runs the report within the system (it requires a date range as body).
In return, I will get an ID that is associated with the data generated and it expires after some time.
A GET call, which is a URL that contains the ID generated in the first call and created with a concatenation.
The first call works fine; I get in return the ID successfully.
My problem is when I run the second call, I don’t get any data in return, and I don’t understand what’s the issue, I can see the URL is concatenated correctly because if I copy the URL from the log and I test it on another apps script or on Postman, it works perfectly fine!
Could someone help me in case I am doing something wrong?
Here’s the code:
function callEvents() {
var API_KEY = "xxx";
var data = { 'Start Date': '2021-05-03', 'End Date': '2021-06-03' }
var options = {
'method' : 'post',
'contentType': 'application/json',
'payload' : JSON.stringify(data) };
//This is the first call
var urlEncoded = encodeURI('https://website/api/dataviewresult/
etc/json/?api_key=' + API_KEY);
var url = UrlFetchApp.fetch(urlEncoded, options);
var result = JSON.parse(url.getContentText());
Logger.log(url.getContentText());
//here I retrieve the ID to use in the second call
var ipdataview = (result["contents"]["id"]);
Logger.log(ipdataview);
//here is the concatenation and the second call
var urlEncoded2 = encodeURI('https://website/api/dataviewresult/etc/json/'+ipdataview+'/?api_key=' + API_KEY);
Logger.log(urlEncoded2);
var response = UrlFetchApp.fetch(urlEncoded2);
Logger.log(response.getContentText());

Answer 1

I found out the solution, I was doing the second call (Get) too soon from the first one, so the data was not being picked up.
I used utilities.sleep() for about 2 seconds and it worked perfectly.
Thank you for everyone helping!
S