func publishMessage() {
    if(messageTextField.text != "" || messageTextField.text != nil){
        let messageString: String = messageTextField.text!
        let messageObject : [String:Any] =
            [
                "message" : messageString,
                "username" : username,
                "uuid": client.uuid()
        ]

        client.publish(messageObject, toChannel: channelName) { (status) in
            print(status.data.information)
        }
        messageTextField.text = ""
    }

}

//When the send button is clicked, the message will send
@IBAction func sendMessage(_ sender: UIButton) {
    publishMessage()
}