Webview verse REST code

Question

Below is the code I was using to connect to my website. Need code to replace webview code with REST code because Webview no longer work and not supported.

Button1.Click += (sender, e) =>
{

            Button1.Visibility = Android.Views.ViewStates.Gone;
            TheRegButton.Visibility = Android.Views.ViewStates.Gone;

            WebView webView = FindViewById<WebView>(Resource.Id.webView1);
            webView.Settings.JavaScriptEnabled = true;

            webView.LoadUrl("https://www.smbudget3.com/shopping_signon.aspx"); // (ok now) err_connection_reset
                                                                                                                                // webView.LoadUrl("https://www.smbudget3.com/budgetsignonandroid.aspx");
        };