public Dictionary <string, object> Add(Register r)
        {
            Dictionary <string, object> resp = new Dictionary <string, object>();

            if (rp.Existed(r.Email))
            {
                resp.Add("error", "Already Existed");
                return(resp);
            }
            else
            {
                resp.Add("success", rp.Insert(r));
                return(resp);
            }
        }