public IHttpActionResult PostOwner(Owner user) { if (!ModelState.IsValid) { return(BadRequest(ModelState)); } ObjectParameter output = new ObjectParameter("responseMessage", typeof(string)); db.PR_CreateOwner(user.User.IdCard, user.User.Username, user.User.Password, user.User.FirstName, user.User.MiddleName, user.User.LastName, user.User.SecondLastName, output); RegisterResponse response = new RegisterResponse() { Response = output.Value.ToString() }; return(Ok(response)); }