private function map_create_account_error( \WP_Error $error ) {
    switch ( $error->get_error_code() ) {
      // WordPress core error codes.
      case 'empty_username':
      case 'invalid_username':
      case 'empty_email':
      case 'invalid_email':
      case 'email_exists':
      case 'registerfail':
        return new \Exception( 'woocommerce_rest_checkout_create_account_failure' );
    }

    return new \Exception( 'woocommerce_rest_checkout_create_account_failure' );
  }