public JsonResult MakeCourseActive(int id)
        {
            try
            {
                _repository.UpdateCourseToActive(id);

                Response.StatusCode = (int)HttpStatusCode.Accepted;
                return(Json("course started"));
            }
            catch (Exception ex)
            {
                _logger.LogError("Failed to start course", ex);
                Response.StatusCode = (int)HttpStatusCode.BadRequest;
                return(Json("Failed to start course"));
            }
        }