public function getUserByProviderId($provider, $identifier)
    {
        $this->oDb->select('user_id');
        $this->oDb->where('provider', $provider);
        $this->oDb->where('identifier', $identifier);

        $oUser = $this->oDb->get(NAILS_DB_PREFIX . 'user_social')->row();

        if (empty($oUser)) {
            return false;
        }

        return $this->oUserModel->getById($oUser->user_id);
    }