@IBAction func loginInBtn(sender: AnyObject) {

PFUser.logInWithUsernameInBackground(email.text, password: password.text) {
    (user:PFUser?, error:NSError?) -> Void in

    if error == nil {


        self.performSegueWithIdentifier("next", sender: self)

    } else {

        print("wrong Password")

    }

    }