public function create($account = NULL, $params = array()) {
    if(is_string($account)) {
      $json = trim($account);
    } else if(is_array($account)) {
      $json = json_encode($account);
    } else {
      throw new Services_Zencoder_Exception(
        'Account parameters required to create account.');
    }
    return new Services_Zencoder_Account($this->proxy->createData("account", $json, $params));
  }