title: A seemingly strange OAuthException
body: <p>I am learning to build fb apps, and on the very first attempt, I get this strange OAuthException. The tutorial clearly mentions that I need to pass redirect_uri, client_secret, client_id and code(from the app auth phase). But when the flow completes, instead of getting an access token here is the JSON error object I get:</p>
  
  <pre><code>{"error":{"message":"client_secret should not be passed to \/oauth\/access_token\/","type":"OAuthException"}}
  </code></pre>
  
  <p>EDIT: this is the snippet I'm using to build the url(pardon the excessive 2nd line, please)</p>
  
  <pre><code>url = "https://graph.facebook.com/oauth/access_token/"
  url += "?" 
  url += urllib.urlencode([('client_id',client_id),
                             ('redirect_uri', redirect_uri),
                             ('client_secret', client_secret),
                             ('code', code)])
  </code></pre>
  
  <p>where the variables hold correct values.(checked > 5 times)</p>