gistfile1.php

    public function add()
    {
    	$userId = null;
    	$client = $this->Clients->newEntity();
    	$client = $this->Clients->patchEntity($client, $this->request->data);
    	 
    	if ($this->request->is('post')) {
			$user = $this->Clients->User->newEntity();
    	 	$user->role_id = 2;
    	 	$user->username = $this->request->data['cnpj'];
    	 	$user->password = substr($this->request->data['cnpj'], 0, 4);
    	  
    	 	if ($this->Client->User->save($user)) {
    	 		$userId = $this->Client->User->getLastInsertId();
    	 	}
		}
		if (isset($userId) && $this->request->is('post')) {
			$client = $this->Clients->patchEntity ( $client, $this->request->data );
			$client->user_id = $userId;
			if ($this->Clients->save ($client)) {
				$this->Flash->success ('The client has been saved.');
				return $this->redirect (['action' => 'index']);
			} else {
				$this->Flash->error ( 'The client could not be saved. Please, try again.' );
			}
		}
    	
        $regions = $this->getRegions();
        
        $this->set(compact('client', 'regions'));
        $this->set('_serialize', ['client']);
    }