How to set default date to today in google form?

I need to set in a google form response the today date (Not hardcoded) when submited

I'm accesing the form, adding a date question, setting the title and the help text, but nothing more

function myFunction() {
    var myForm = FormApp.openById("MyFormID");
    var formDate = myForm.addDateItem();
    formDate.setTitle('Ciclo');
    formDate.setHelpText('Ciclo de registro');
    //This is doing nothing at all
    //var formDateResponse = formDate.createResponse(new Date());
 }

Im only getting the date question unfilled

A FormResponse has a getTimestamp() function built into it.

If you are using an onSubmit Trigger you can get it by:

function onSubmit(e){
  var response = e.response;
  var timestamp = response.getTimestamp(); //Date Object!
}

It's important to note that if you have an onSubmit Trigger in Google Sheets it does not provide the e.response FormResponse object, but instead a values array, namedValues array, or range object.