public IActionResult AddNewClinker(AddNewClinkerCommand newClinker)
        {
            var existingClinker = _repository.GetIdByClinkerName(newClinker.FirstName, newClinker.LastName, newClinker.PrisonTermEndDate);

            if (existingClinker == null)
            {
                var createdClinker = _repository.AddNewClinker(newClinker);
                return(Created("", createdClinker));
            }
            else
            {
                return(BadRequest("Clinker already exists."));
            }
        }
        public Clinker AddNewClinker(AddNewClinkerCommand newClinker)
        {
            var sql = @"INSERT INTO CLINKER (FirstName, LastName, PrisonTermEndDate)
                       output inserted.*
                       VALUES (@FirstName, @LastName, @PrisonTermEndDate)";

            using (var db = new SqlConnection(ConnectionString))
            {
                var parameters = new
                {
                    FirstName         = newClinker.FirstName,
                    LastName          = newClinker.LastName,
                    PrisonTermEndDate = newClinker.PrisonTermEndDate
                };

                var result = db.QueryFirstOrDefault <Clinker>(sql, parameters);
                return(result);
            }
        }