CefSharp with Proxy Authentication

Question

I want to use CefSharp with proxy.

I have the following code in C#:-

var settings = new CefSettings();
            settings.CachePath = "cache";
            settings.CefCommandLineArgs.Add("proxy-server", ProxyAddress);

            Cef.Initialize(settings);

But I also want to provide proxy username and password. How can I do proxy authentication in CefSharp ?