How to use Facebook login on Windows universal platform?

I'm trying to mount Facebook login to an app so that it works using the app or website according to the tutorial:

link

It has a similar question, but that does not answer me by limiting the solution to the application only as I understood it: Using Facebook Login on Windows Phone 8.1 1

I just added the xml file to my Facebook application id. I also added the protocol and put this code in my main code:

        protected override void OnActivated(IActivatedEventArgs args)
        {
            base.OnActivated(args);

            // You can setup a event handler to be called back when the authentication has finished
            Session.OnFacebookAuthenticationFinished += OnFacebookAuthenticationFinished;

            var protocolArgs = args as ProtocolActivatedEventArgs;
            LifecycleHelper.FacebookAuthenticationReceived(protocolArgs);
        }

        private void OnFacebookAuthenticationFinished(AccessTokenData session)
        {
            // here the authentication succeeded callback will be received.
            // put your login logic here
        }

However, trying to add Facebook.client I could not and probably because of this, the above functions are not being recognized so I can override.

Does anyone know what might be missing? How do you complete this goal?