swift - salesforce chat only

var chatConfig: SCSChatConfiguration?let POD = "YOUR_POD_NAME"
let ORG_ID = "YOUR_ORG_ID"
let DEPLOYMENT_ID = "YOUR_DEPLOYMENT_ID"
let BUTTON_ID = "YOUR_BUTTON_ID"override func viewDidLoad() {
  super.viewDidLoad()
  chatConfig = SCSChatConfiguration(liveAgentPod: POD,
                                    orgId: ORG_ID,
                                    deploymentId: DEPLOYMENT_ID,
                                    buttonId: BUTTON_ID)
}