anchor.diff:      _isLoading = true;
       try {
         /// fetch data
  -      String _response =
  -          await _networkHelper.authorizedFetch(endpoint, headers);
  +      String _response = await _networkHelper.fetchData(endpoint);
   
         /// parse data
  -      final data = eventModelFromJson(_response);
  +      final data = eventsModelFromJson(_response);
         _isLoading = false;
         _data = data;
         return true;
       } catch (e) {
  -      if (e.response != null && e.response.statusCode == 401) {
  -        if (await getNewToken()) {
  -          return await fetchData();
  -        }
  -      }
         _error = e.toString();
  -      print(_error);
         _isLoading = false;
  -      return false;
  -    }
  -  }
  -
  -  Future<bool> getNewToken() async {
  -    final String tokenEndpoint = "https://api-qa.ucsd.edu:8243/token";
  -    final Map<String, String> tokenHeaders = {
  -      "content-type": 'application/x-www-form-urlencoded',
  -      "Authorization":
  -          "Basic djJlNEpYa0NJUHZ5akFWT0VRXzRqZmZUdDkwYTp2emNBZGFzZWpmaWZiUDc2VUJjNDNNVDExclVh"
  -    };
  -    try {
  -      var response = await _networkHelper.authorizedPost(
  -          tokenEndpoint, tokenHeaders, "grant_type=client_credentials");
  -      headers["Authorization"] = "Bearer " + response["access_token"];
  -      return true;
  -    } catch (e) {
  -      _error = e.toString();
         return false;
       }
     }
  
positive.code:   List<EventModel> _data;
  
    final NetworkHelper _networkHelper = NetworkHelper();
    final Map<String, String> headers = {
      "accept": "application/json",
    };
  
    EventsService() {
      fetchData();
  
negative.code: 
  class EventsService {
    final String endpoint =
        'https://9tqs71by9h.execute-api.us-west-2.amazonaws.com/qa/v1/events/student-v2';
  
    bool _isLoading = false;
    DateTime _lastUpdated;
  