//Tableview functions required.
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    //change later
    return messages.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "MessageCell") as! MessageCell

    cell.messageLabel.text = messages[indexPath.row].message
    cell.usernameLabel.text = messages[indexPath.row].username


    return cell
}