AffiliateWP - Send email to affiliate when their application is pending approval

gistfile1.php

<?php

/**
 * Send email to affiliate when their application is pending
 */
function affwp_custom_affiliate_pending_email( $affiliate_id, $status ) {
	// affiliate is pending
	if ( 'pending' == $status ) {
		// this is the subject line
		$subject = 'Your application is pending approval';

		// get our message
		$message = affwp_custom_affiliate_pending_email_body( $affiliate_id );

		// send mail
		affiliate_wp()->emails->send( affwp_get_affiliate_email( $affiliate_id ), $subject, $message );
	}
}
add_action( 'affwp_register_user', 'affwp_custom_affiliate_pending_email', 10, 2 );

/**
 * The email body of the pending application email
 */
function affwp_custom_affiliate_pending_email_body( $affiliate_id ) {
	$message = sprintf( "Hi %s,", affiliate_wp()->affiliates->get_affiliate_name( $affiliate_id ) ) . "\n\n";
	$message .= sprintf( "Thank you so much for applying to become an affiliate on %s. Your application will be reviewed shortly.", get_bloginfo( 'name' ) ) . "\n\n"; 
	$message .= get_bloginfo( 'name' ) . "\n";
	$message .= home_url();

	return $message;
}