Firebase Firestore Swift, Timestamp but server time?

With Firestore, I add a timestamp field like this

    var ref: DocumentReference? = nil
    ref = Firestore.firestore()
        .collection("something")
        .addDocument(data: [
            "name": name,
            "words": words,
            "created": Timestamp(date: Date())
        ]) { ...
            let theNewId = ref!.documentID
            ...
    }

That’s fine and works great, but it’s not really correct. Should be using the "server timestamp" which Firestore supplies.

Pls note this is on iOS (Swift) and Firestore, not Firebase.

What the heck is the syntax to get a server timestamp?

Source: Ios Questions