public Response.Response <int> createQuize(quize obj)
        {
            Response.Response <int> response = new Response.Response <int>();
            //check if quize name is already exist for this user
            bool nameexist = _service.checkQuizeNameExist(obj.userId.Value, obj.name);

            if (!nameexist)
            {
                var result = _service.addQuize(obj);
                response.Result     = result;
                response.StatusCode = 200;
            }
            else
            {
                response.Result     = 0;
                response.StatusCode = 400;
                response.message    = "Name aleardy exist";
            }
            return(response);
        }
 /// <summary>
 /// add quize
 /// </summary>
 /// <param name="obj"></param>
 /// <returns></returns>
 public int addQuize(quize obj)
 {
     context.quizes.Add(obj);
     context.SaveChanges();
     return(obj.Id);
 }