src/Factory/Validator/UsernameValidatorFactory.php
public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $services = $serviceLocator->getServiceLocator();
        /* @var $options InputFilterOptionsInterface */
        $options = $services->get(ModuleOptions::class);

        $validator = new ValidatorChain();
        $validator->setPluginManager($serviceLocator);

        $validator->attachByName('StringLength', [
            'messages' => [
                StringLength::TOO_SHORT => 'The username must be at least %min% characters long',
                StringLength::TOO_LONG => 'The username must not be more than %max% characters',
            ],
            'encoding' => 'UTF-8',
            'min' => 5,
            'max' => 30,
        ], true);

        $validator->attachByName('Regex', [
            'messages' => [
                Regex::NOT_MATCH => 'Incorrect username. ' .
                    'Username must contain alphanumeric characters without spaces',
            ],
            'pattern' => $options->getUsernameRegexPattern(),
        ], true);

        $validator->attachByName('CmsUserNoUsernameExists', [], true);

        return $validator;
    }
public function createService(ServiceLocatorInterface $serviceLocator)
    {
        $services = $serviceLocator->getServiceLocator();
        /* @var $options InputFilterOptionsInterface */
        $options = $services->get(ModuleOptions::class);

        $validator = new ValidatorChain();
        $validator->setPluginManager($serviceLocator);

        $validator->attachByName('StringLength', [
            'messages' => [
                StringLength::TOO_SHORT => 'The username must be at least %min% characters long',
                StringLength::TOO_LONG => 'The username must not be more than %max% characters',
            ],
            'encoding' => 'UTF-8',
            'min' => 5,
            'max' => 30,
        ], true);

        $validator->attachByName('Regex', [
            'messages' => [
                Regex::NOT_MATCH => 'Incorrect username. ' .
                    'Username must contain alphanumeric characters without spaces',
            ],
            'pattern' => $options->getUsernameRegexPattern(),
        ], true);

        $validator->attachByName('CmsUserNoUsernameExists', [], true);

        return $validator;
    }
{@inheritDoc}

@return ValidatorInterface