func checkFields() -> Bool {

    if((!loginPasswordTextField.text!.isEmpty) && (!loginPasswordTextField.text!.isEmpty)){
        return true
    } else {
        print("Empty Field was found")

        return false
    }
}

func displayMessage(errorMessage:String?, fromViewController:UIViewController){

    let titleMessage = "Error"
    let alert = UIAlertController(title: titleMessage, message: errorMessage, preferredStyle: .Alert)
    let actionOK = UIAlertAction(title: "Ok", style: .Default, handler: nil)
    alert.addAction(actionOK)
    fromViewController.presentViewController(alert, animated: true, completion: nil)

}

self.displayMessage(error.localizedDescription, fromViewController: self)