requestSchedule method Null safety
Sends an http request to get the corresponding schedule to the currently signed in student.
Implementation
Future<Response> requestSchedule() async {
  final endpoint = Uri.https(Environment.host, '/schedule');
  final headers = <String, String>{
    HttpHeaders.authorizationHeader: 'Basic ${_storageProvider.token}'
  };
  return _httpProvider.get(endpoint, headers: headers);
}