/// <summary>
        /// Gets all StudyGroups from the servers REST Api.
        /// </summary>
        public async Task UpdateJobTypesFromServer()
        {
            DbJobType db = new DbJobType();
            System.Diagnostics.Debug.WriteLine("JobTypesController - UpdateJobTypesFromServer: initiated");
            DbStudent dbStudent = new DbStudent();
            string accessToken = dbStudent.GetStudentAccessToken();

            if (accessToken == null)
            {
                Authenticater.Authorized = false;
                return;
            }

            Uri url = new Uri(Adress);
            System.Diagnostics.Debug.WriteLine("JobTypesController - url " + url.ToString());
            var client = new HttpClient();
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
            try
            {
                var response = await client.GetAsync(url);
                if (response.StatusCode == HttpStatusCode.OK)
                {
                    System.Diagnostics.Debug.WriteLine("GetJobTypesFromServer response " + response.StatusCode.ToString());
                    var newJobTypes = await response.Content.ReadAsAsync<IEnumerable<JobType>>();
                    db.DeleteAllJobTypes();
                    db.InsertJobTypes(newJobTypes);
                }
                if (response.StatusCode == HttpStatusCode.Unauthorized)
                {
                    Authenticater.Authorized = false;
                }
            }

            catch (Exception e)
            {
                System.Diagnostics.Debug.WriteLine("JobTypesController - UpdateJobTypesFromServer: await client.GetAsync(\"url\") Failed");
                System.Diagnostics.Debug.WriteLine("JobTypesController - UpdateJobTypesFromServer: Exception msg: " + e.Message);
                System.Diagnostics.Debug.WriteLine("JobTypesController - UpdateJobTypesFromServer: Stack Trace: \n" + e.StackTrace);
                System.Diagnostics.Debug.WriteLine("JobTypesController - UpdateJobTypesFromServer: End Of Stack Trace");
            }
        }