public function Store($token)
    {
        if (!is_writable($this->GetPathToTemporaryFolder())) {
            throw new \MangoPay\Libraries\Exception('Cannot create or write to file ' . $this->GetPathToTemporaryFolder());
        }
        
        $serialized = serialize($token);
        $result = file_put_contents($this->GetPathToFile(), $this->_prefixContent . $serialized, LOCK_EX);
        if ($result === false) {
            throw new \MangoPay\Libraries\Exception('Cannot put token to file');
        }
    }