Forminator - customize new user registration mail

forminator-regmail-customize.php

<?php
/*****************************
*
* A very crude way to customize new user registration mail for Frominator
* use as MU plugin
*
* customize message in $new_message variable
* customize subject in $mail_args[ 'subject' ] = 'New subject"; line
*
* tested with Forminator 1.15.10
*
* by Adam/WPMU DEV
*
*******************************/

add_filter(
'forminator_custom_form_user_registration_before_insert',
function( $new_user_data ) {
	add_filter(
	'wp_mail',
	function( $mail_args ) use ($new_user_data) {

		$new_message = 'Hi, your username is: ' . $new_user_data['user_login'] . ' and your mail is: ' . $new_user_data['user_email'];

		$mail_args[ 'subject' ] = 'New subject';
		$mail_args[ 'message' ] = $new_message;


		return $mail_args;
	},
	10,
	3
	);

	return $new_user_data;
}
);