func setupKeyboardObservers(){
    NotificationCenter.default.addObserver(self, selector: #selector(handleKeyboardDidShow), name: UIResponder.keyboardDidShowNotification, object: nil)
}

override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)
    NotificationCenter.default.removeObserver(self)
}

@objc func handleKeyboardDidShow(){
    print("did show LOL")
    if chatMessages.count > 0{
        let indexPath = NSIndexPath(item: chatMessages.count-1, section: 0)
        collectionView?.scrollToItem(at: indexPath as IndexPath, at: .top, animated: true)
    }
}