title: Extracting session a key from a Facebook access token
body: <p>What does this format of access token mean? </p>
  
  <pre><code>AAAEGXJapkeoBAGRlZC7aBLhiZBMMUEVZAAF68ZBhZBwD0ER1MwvkXlRUZCwOaczfgsGwHbnAYBcTU9VrPZCyYw3pIJmCIMZBxSnCPNGqPRWZALgZDZD
  </code></pre>
  
  <p>How can I get a session key from it?</p>