public account_t_user Get_User(string UserID)
 {
     try
     {
         using (sartas3 db = new sartas3())
         {
             account_t_user user = db.account_t_user.Where(n => n.UserID == UserID).FirstOrDefault();
             return(user);
         }
     }
     catch (Exception ex) { throw ex; }
 }
        public account_t_user Get_User(string UserName, string Password)
        {
            try
            {
                using (sartas3 db = new sartas3())
                {
                    account_t_user user = db.account_t_user.Where(n => n.UserName == UserName && n.Password == Password).FirstOrDefault();

                    return(user);
                }
            }
            catch (Exception ex) { throw ex; }
        }