What are AudienceId's?

[Trine....@groupm.com]

Hi! 

the following code gives me an error, because it does not recognize the audienceID. I have used the ones from the report called "uservertical::91800", and have tried just typing in numbers such as 1,2,3 etc. Why is it not updating? Can you help?

function interests() {

   var interests = []

   var campaignIterator = AdsApp.campaigns().withIds([1668598316]).get()

   while (campaignIterator.hasNext()){

     var campaign = campaignIterator.next()

     var adgroupIterator = campaign.adGroups().get()

     

     while (adgroupIterator.hasNext()){

       var adgroup = adgroupIterator.next()

        var audienceBuilder = adgroup.targeting().newUserListBuilder();

  var audienceOperation = audienceBuilder

    .withAudienceId(91800)              // required

    .withBidModifier(1.1)             // optional

  .build();                       // add the audience

var audience = audienceOperation.getResult()}}}