Like facebook business page using built-in like open-graph api not working with javascript sdk
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How do I like a Facebook business page once the user has logged in and authorized my app to Publish on his/her behalf? Here's my code so far: 

    window.fbAsyncInit = function() {
        FB.init({ appId: 'MY_APP_ID',                    
            status: true, 
            cookie: true,
            xfbml: true,
            oauth: true});

            document.getElementById('fb-auth').addEventListener('click', function() {
              FB.login(function(response){
                if(response.authResponse){ // user has authorized app
                    FB.api('/me/likes/BUS_PAGE_ID', function(response){
                        if(response.data.length>0) {
                           // user has liked the page
                        } else {
                           // like the page for the user                                  
                        }
                    });
                }
              }, {scope:'publish_actions, user_likes'});
            }, false);
    };

The code is working to the point that it authorizes the app and I can see if the business page is liked by the user with FB.api(...) if(response.data.length>0). What do I put in the place of // like the page for the user so that my app can like a specific business page and add it to the user's likes? Thank you.