Roman Terekhin

$accounts = new Accounts;
        $accounts->login = 'test';
        $accounts->password = 'ABCDEF';
        $accounts->steam_guard = '0';
        $accounts->worker_id = '1';
        if ($accounts->save() === false) {
               $messages = $accounts->getMessages();
               foreach ($messages as $message) {
                            echo $message, "\n";
                }
        }

$loader = new \Phalcon\Loader();

$loader->registerNamespaces(
    [
        'App\\Models' => __DIR__ . '/models/',
    ]
);

$loader->registerDirs(
    [
        ...
         __DIR__ . '/models/',
        ...
    ]
)->register();

namespace App\Models;

class Accounts extends \Phalcon\Mvc\Model {
    public $id;

    public $login;

    public $password;

    public $steam_guard;

    public $email;

    public $worker_id;
}

use App\Models\Accounts;

class AdminController extends \Phalcon\Mvc\Controller {
    public function getAccounts() {
        $accounts = Accounts::find();
        
        return $this->response->setJsonContent(['accounts' => $accounts])->send();
    }
}