public async Task <ResponseBase <List <Exam> > > GetExams(int userId, string accessToken)
        {
            var response = await _apiService.GetAsync($"/api/FavoriteExam?userId={userId}", accessToken);

            if (response.Success)
            {
                ResponseBase <List <Exam> > exams = JsonConvert.DeserializeObject <ResponseBase <List <Exam> > >(response.ContentBody);
                return(exams);
            }
            return(new ResponseBase <List <Exam> >()
            {
                success = response.Success,
                msg = response.StatusCode.ToString()
            });
        }