public function saveToken($token)
    {
        $rows = $this->_db->query(
            'UPDATE '.$this->_dbConfig['table']
                        .' SET '.$this->_dbConfig['token'].' = :tk'
                        .' WHERE '.$this->_dbConfig['id'].' = :id',
            [':tk'=>$token, ':id'=>$this->_data['id']]
        );
        if ($rows > 0) {
            $this->_data['token'] = $token;
            return true;
        }
        return false;
    }