public IActionResult AddEnemies(int id, Clinker enemyToAdd) { var clinkerToUpdate = _repository.GetById(id); if (!clinkerToUpdate.Enemies.Any(c => c.Name == enemyToAdd.Name)) { _repository.AddClinkerEnemy(id, enemyToAdd); } else { return(BadRequest($"Already enemies with {enemyToAdd.Name}.")); } var updatedClinker = _repository.GetById(id); return(Ok(updatedClinker)); }