How to track an ad-acquired user across app usages?

[Ralph Damiano]

So basically what I'm trying to do is record a user whose "first_open" event came from an ad campaign (adwords, facebook, etc).

Now, I see Firebase records it properly under "Attribution" with "campaign" filter, I see my Adwords campaigns listed as the source of the first_open event for some users.

Do I, in the app/code, have access to the same data? I would like to note down when a user first_open's my app from a campaign, and save that information.
That way, if this user opens the app 5-10-100 more times, and on the 100th time a purchase is made, I know that this purchase is a result of the ad.
(I would pass in the value of this previously saved information with the purchase event, or click event, or whatever I want to record. This would tell me this purchase/click/etc is being made by a user who obtained the app through a paid campaign.)

Is this something built-into Firebase, and I'm going about it the hard way? If not, how can I access the first_open event and it's campaign source (if any) through code in the app?