public function getAccountUser($isForceReload = false)
    {
        if ($isForceReload || null === $this->joinOneCacheAccountUser) {
            $mapper = new AccountUserMapper($this->dependencyContainer->getDatabase('money'));
            $this->joinOneCacheAccountUser = $mapper->findByKeys(array(
                'account_id' => $this->getId(),
            ));
        }
        
        return $this->joinOneCacheAccountUser;
    }