'The email is already used.', self::USER_EXISTING_NAME => 'The username is already used.', self::USER_EXISTING_EMAIL_AS_NAME => 'An equal username is already used.', self::USER_EXISTING_NAME_AS_EMAIL => 'An equal email is already used.', ]; public $message = 'The user has invalid settings.'; public function getTargets() { return self::CLASS_CONSTRAINT; } }