code: def _get_access_token(self, verifier=None):
          
          
          response, content = self.client(verifier).request(
              self.access_token_url, "POST")
          
          content = smart_unicode(content)
  
          if not response['status'] == '200':
              raise OAuthError(_(
                  u"Invalid status code %s while obtaining access token from %s: %s") % 
                  (response['status'], self.access_token_url, content))
          
          token = dict(urlparse.parse_qsl(content))
          
          
          return (oauth.Token(token['oauth_token'], token['oauth_token_secret']),
              token)
docs: Fetch an access token from `self.access_token_url`.