title: Facebook API get user accesstoken for app
body: <p>I am posting to my facebook wall through my app using my user.
  I gave to the app offline access but still, sometimes the accesstoken changes.</p>
  
  <p>I would like to know if its possible to use Facebook API to get the accesstoken?</p>
  
  <p>Right now, I used the example.php from the facebook sdk to login and took the accesstoken from there.</p>
  
  <p>again, I dont want the application accesstoken. I want to user accesstoken of using the app.</p>
  
  <p>Thanks.</p>