Hook um_registration_for_loggedin_users

um_registration_for_loggedin_users.php

<?php

/**
 * Hook: um_registration_for_loggedin_users
 *
 * Type: filter
 *
 * Description: Allows to display the registration form for logged in users if TRUE. Default value is FALSE.
 *
 * @example https://github.com/ultimatemember/ultimatemember/blob/master/includes/core/class-shortcodes.php#L686
 *
 * @package um\core
 * @see     um\core\Shortcodes::load()
 * @since   2.0
 * @version 3.0
 *
 * @param bool $enable_loggedin_registration Enable registration for logged in.
 *
 * @return bool Enable registration for logged in.
 */
function my_registration_for_loggedin_users( $enable_loggedin_registration ) {
	// your code here.
	return $enable_loggedin_registration;
}
add_filter( 'um_registration_for_loggedin_users', 'my_registration_for_loggedin_users', 10, 1 );