Can't get the identity value

[Aruldevi429]

Hello, I would like to say the app looks awesome!
I ran into a compilation issue on the way to work that I thought I would file here.

Got identity values were nil.

func login() {
    
    TwilioChatClient.setLogLevel(.debug)

    // Fetch Access Token from the server and initialize Chat Client - this assumes you are running
    // the PHP starter app on your local machine, as instructed in the quick start guide
    let deviceId = UIDevice.current.identifierForVendor!.uuidString
    let urlString = "\(tokenURL)?identity=\(identity)&device=\(deviceId)"
    
    TokenUtils.retrieveToken(url: urlString) { (token, identity, error) in
       
        if let token = identity {
            // Set up Twilio Chat client
            TwilioChatClient.chatClient(withToken: token, properties: nil, delegate: self) {
                (result, chatClient) in
                    self.client = chatClient;
                    // Update UI on main thread
                    DispatchQueue.main.async() {
                        self.navigationItem.prompt = "Logged in as \"\(self.identity)\""
                 }
            }
        } else {
            print("Error retrieving token: \(error.debugDescription)")
        }
    }
}