Firebase still retrieving authData after deletion

After I manually deleted the account connected to the uid that my iphone simulator is on (from firebase dashboard), when I run the code below it's somehow still authenticating and retrieving a uid. How is this possible?

let ref = Firebase(url: "https://moviebuffapp.firebaseio.com/")

override func viewDidLoad() {
    super.viewDidLoad()

    if ref.authData != nil {

        let uid = ref.authData.uid
        print(uid)