public async Task <HomeWorkDTO> GetHomeWorkAsync(int lessonId)
        {
            using (HttpClient client = new HttpClient())
            {
                client.DefaultRequestHeaders.Add("Authorization", "Bearer " + _accountProvider.AccountInfo.Token);
                try
                {
                    var respnse = await client.GetAsync(AccountProvider.BASEURL + "/api/HomeWorks/" + lessonId);

                    if (respnse.StatusCode != HttpStatusCode.OK)
                    {
                        return(null);
                    }

                    var stringResult = await respnse.Content.ReadAsStringAsync();

                    HomeWorkDTO result = JsonConvert.DeserializeObject <HomeWorkDTO>(stringResult);

                    return(result);
                }
                catch (Exception)
                {
                    return(null);
                }
            }
        }
        public async Task <bool> CheckHomeWorkAsync(HomeWorkDTO homeWork)
        {
            using (HttpClient client = new HttpClient())
            {
                HttpContent content = new StringContent(JsonConvert.SerializeObject(homeWork), Encoding.UTF8, "text/json");

                client.DefaultRequestHeaders.Add("Authorization", "Bearer " + _accountProvider.AccountInfo.Token);
                try
                {
                    var respnse = await client.PostAsync(AccountProvider.BASEURL + "/api/HomeWorks/", content);

                    if (respnse.StatusCode != HttpStatusCode.OK)
                    {
                        return(false);
                    }

                    return(JsonConvert.DeserializeObject <bool>(await respnse.Content.ReadAsStringAsync()));
                }
                catch (Exception)
                {
                    return(false);
                }
            }
        }