Implement read from JSON for LCD controller

[diegovalverde]

Have a look at LoginController.cs

IEnumerator DownloadString(string uri, Action<string> callback)
    {
        using (UnityWebRequest webRequest = UnityWebRequest.Get(uri))
        {
            // request and wait for page
            yield return webRequest.SendWebRequest();

            string[] pages = uri.Split('/');
            int page = pages.Length - 1;

            if (webRequest.isNetworkError)
            {
                Debug.LogError(pages[page] + ": Error: " + webRequest.error);
            }
            else
            {
                callback(webRequest.downloadHandler.text);
                //Debug.Log(pages[page] + ":\nReceived: " + webRequest.downloadHandler.text);
            }
        }
    }