title: Authenticate with twitter tastypie python social auth return 403
body: <p>I'm managing my social authentication with tastypie and python-social-auth.
  I had no problem authenticating via facebook by doing the following :</p>
  
  <pre><code>from social.apps.django_app import load_strategy
  provider = “facebook”
  access_token = “CAAIkpON595IBADC8CqXgq615wfsls15u6RI23sreqbzntau”
  strategy = load_strategy(backend=provider)   
  user = strategy.backend.do_auth(access_token)
  </code></pre>
  
  <p>but when i try to do the same with provider="twitter" and a valid access token, i keep getting 403 when calling the 'do_auth' method.
  I managed to cURL to the twitter api, so my credentials are valid.</p>
  
  <p>Am i missing any steps in the way? is twitter authentication should be different the facebook's?</p>
  
  <p>Thanks!</p>