         prepareCloseButton()
         prepareInViteUsersLabel()
         prepareSearchBar()
+        prepareSendInvitationButton()
     }
 }

    fileprivate var closeButton: UIButton!
    fileprivate var inViteUsersLabel: UILabel!
    fileprivate var searchBar: UISearchBar!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        inViteUsersLabel.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 14).isActive = true
        inViteUsersLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 79.5).isActive = true
        inViteUsersLabel.translatesAutoresizingMaskIntoConstraints = false
    }
    
    @objc func cancelBtnAction(sender:UIButton!) {
