Customize woocommerce coupon message

Customize WooCommerce coupon message: Modify the text displayed when a coupon is applied.

add_filter( 'woocommerce_coupon_error', function($err, $err_code, $coupon){
	if( class_exists('\Wdr\App\Helpers\Rule') ){
		$coupon_code = '';
		if (method_exists($coupon, 'get_code')) {
			$coupon_code =  $coupon->get_code();
		}
		$rule_helper = new \Wdr\App\Helpers\Rule();
		$available_coupons = $rule_helper->getAllDynamicCoupons();
		if (!empty($coupon_code) && in_array($coupon_code, $available_coupons)) {
		    return "Load your message here!"; 
		}
	}
	return $err; 
}, 30, 3 );