Show myCRED Generated Coupons for Woo

/**
 * View my Coupons
 * @since 1.4
 * @version 1.1
 */
add_shortcode( 'mycred_my_coupons', 'mycred_pro_render_shortcode_my_coupons' );
function mycred_pro_render_shortcode_my_coupons( $attr, $content ) {

	extract( shortcode_atts( array(
		'user_id' => NULL,
		'ctype'   => 'mycred_default',
		'ref'     => 'points_to_coupon',
		'number'  => 10
	), $attr ) );

	if ( ! function_exists( 'mycred' ) ) return 'myCRED is not installed';

	if ( $user_id === NULL && ! is_user_logged_in() ) return $content;
	if ( $user_id === NULL )
		$user_id = get_current_user_id();

	$args = array();

	$args['user_id'] = $user_id;
	$args['ref'] = $ref;
	$args['number'] = $number;

	$log = new myCRED_Query_Log( $args );

	$log->headers = array(
		'coupon-code'   => 'Coupon Code',
		'coupon-status' => 'Status',
		'coupon-date'   => 'Date Created',
		'coupon-value'  => 'Value'
	);

	ob_start();

	if ( $log->have_entries() )
		$log->display();

	else
		echo '<p>You do not have any coupons</p>';

	$content = ob_get_contents();
	ob_end_clean();

	return $content;

}

/**
 * View my Coupons Column : Code
 * @version 1.2
 */
add_filter( 'mycred_log_coupon-code', 'mycred_pro_column_coupon_code', 10, 2 );
function mycred_pro_column_coupon_code( $content, $log ) {

	$data = maybe_unserialize( $log->data );
	return $data['code'];

}

/**
 * View my Coupons Column : Status
 * @version 1.0
 */
add_filter( 'mycred_log_coupon-status', 'mycred_pro_column_coupon_status', 10, 2 );
function mycred_pro_column_coupon_status( $content, $log ) {

	if ( get_the_title( $log->ref_id ) == '' )
		return 'Used';
	else
		return 'Unused';

}

/**
 * View my Coupons Column : Date
 * @version 1.0
 */
add_filter( 'mycred_log_coupon-date', 'mycred_pro_column_coupon_date', 10, 2 );
function mycred_pro_column_coupon_date( $content, $log ) {

	return date_i18n( 'Y-m-d', $log->time );

}

/**
 * View my Coupons Column : Value
 * @version 1.1
 */
add_filter( 'mycred_log_coupon-value', 'mycred_pro_column_coupon_value', 10, 2 );
function mycred_pro_column_coupon_value( $content, $log ) {

	$data = maybe_unserialize( $log->data );
	if ( isset( $data['value'] ) )
		return '$' . $data['value'];
	else
		return '-';

}