public function add($service_id = null)
    {

        if($service_id == null || $service_id==0) {

            throw new \Cake\Network\Exception\NotFoundException(__('Not Found'));

        }

        $serviceUser = $this->ServiceUsers->newEntity();

        if ($this->request->is('post')) {

            $hasher = new DefaultPasswordHasher;

            if (trim($this->request->data['password']) == null) {
                $this->Flash->error(__('Blank space is not allowed.'));
                return $this->redirect(['action' => 'add', $service_id]);
            } else {
                $this->request->data['password'] = $hasher->hash($this->request->data['password']);
                $serviceUser = $this->ServiceUsers->patchEntity($serviceUser, $this->request->data);
            }

            $serviceUser->service_id = $service_id;
            $serviceUser->tenant_id  = $this->Auth->user('tenant_id');

            if ($this->ServiceUsers->save($serviceUser)) {

                $this->Flash->success(__('The service user has been saved.'));
                return $this->redirect(['action' => 'users', $service_id]);

            } else {

                $this->Flash->error(__('The service user could not be saved. Please, try again.'));

            }
        }

        $service = $this->ServiceUsers->Services->get($service_id);

        // $serviceUser['username'] = ' A';
        // $serviceUser->password = 'whatever name';

        $this->set(compact('service', 'serviceUser'));
    }