C#, RestSharp, Type or Namespace name "HttpBasicAuthenticator" could not be found
<pre><code>    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Net.Http;
    using System.Net.Http.Headers;
    using RestSharp;

    namespace ConsoleProgram
    {
        public class TryingOutRest {
            public resttest Execute&lt;resttest&gt;(RestRequest request) where resttest : new() {
            var client = new RestClient();
                client.BaseUrl = new Uri("http://www.ocrwebservice.com");
                client.Authenticator = new HttpBasicAuthenticator("apid", "apikey");
// the key and and id are put in as a string, but i removed them for the purposes of this.
            var re_quest = new RestRequest();
            re_quest.Resource = "/restservices/processDocument";
            var response = client.Execute&lt;resttest&gt;(request);
            }
    }
    }
</code></pre>

<p>So, hi, trying to get to grips with Rest api, Currently doing a project involving it and OCR, as you can probably tell. Tried this, i thought it would work fine, but I seem to have messed up dearly or some naming has changed and i cant find anything relevant in the autofill menu.
Anyone got any idea what's happening?
P.s. if questions about install, i used NuGet for that, so i assume there'd be no problem.</p>