change condition for refresh_token() according to expired_token response.

Author: xuefanzhang

fitbit/api.py

@@ -79,9 +79,8 @@ def make_request(self, url, data={}, method=None, **kwargs):
         if response.status_code == 401:
             d = json.loads(response.content.decode('utf8'))
             try:
-                if(d['errors'][0]['errorType'] == 'oauth' and
-                    d['errors'][0]['fieldName'] == 'access_token' and
-                    d['errors'][0]['message'].find('Access token invalid or expired:') == 0):
+                if(d['errors'][0]['errorType'] == 'expired_token' and
+                    d['errors'][0]['message'].find('Access token expired:') == 0):
                             self.refresh_token()
                             auth = OAuth2(client_id=self.client_id, token=self.token)
                             response = self._request(method, url, data=data, auth=auth, **kwargs)