Sending IDFA to GA from a Facebook ad campaign
I'm trying to get the campaign attributions to track installs for my iOS app from a Facebook ad campaign (mobile).
I followed the instructions from https://developers.google.com/analytics/devguides/collection/ios/v3/campaigns
I'm running Facebook ads campaigns with a download URL (to the App-Store) with the parameters as it says in the URL builder.
The thing is I do not know the macro used to get IDFA from the Facebook App.
Am I doing it wrong? Is it possible what I'm trying to do?