title: using facebook graph with express
body: <p>I'm looking at <a href="https://stackoverflow.com/a/5574902/1893672">this answer</a> and I don't know how to use it with express. lets say at route <code>/fbtest</code> I want to show info on a fb user. the answer suggest that i make a request to <code>https://graph.facebook.com/USER_NAME_OR_ID?access_token=ACCESS_TOKEN</code> and I would get the information on the user. I have a client ID and a client secret how do I get the access token?</p>
  
  <pre><code>app.get("/fbtest", function(req, res){
      make request to fb 
      set var to the returned data
      res.end(the var)
  })
  </code></pre>
  
  <p>through out the fb documentation I see something like <code>GET /me/{namespace}:{action-type}/{object-type}</code> I really want to use something like that for something I need. should I really type in the letters "me" or the username?</p>
  
  <p>I was googling and I see <a href="https://www.npmjs.com/package/fb" rel="nofollow noreferrer">this link</a> that my help but I don't understand the examples like <code>FB.api('4', function (res) {</code> what is <code>4</code>?</p>