Parse LogInView Logo Image very small

Question

I am building an iOS app using Parse as my backend and Swift for the programming language. In my viewDidAppear function, I call the following function:

func showLogin() {

    if (PFUser.currentUser() == nil) {

        var logInViewController = PFLogInViewController()
        logInViewController.delegate = self

        var signUpViewController = PFSignUpViewController()
        signUpViewController.delegate = self

        logInViewController.signUpController = signUpViewController

        // Set custom logo in Log In View
        var logoImage = UIImageView()
        logoImage.image = UIImage(named: "myNewLogo")
        logoImage.contentMode = UIViewContentMode.ScaleAspectFit

        logInViewController.logInView?.logo = logoImage

        self.presentViewController(logInViewController, animated: true, completion: nil)

    }

}

But when I do this, the logo on the Parse UI Log In View is moved a lot higher on the view and shrinks the image VERY small!

How can I set this size and position of the logo?

What size and position SHOULD I use to be similar to the standard Parse logo?

What size should my IMAGE be? Should I include normal and @2x and @3x sizes?