WordPress at a glance
function is not described

admin_created_user_email() WP 1.0

No Hooks.

Return

String.

Usage

admin_created_user_email( $text );
$text(string) (required)

Code of admin created user email: wp-admin/includes/user.php VER 5.0.3

<?php
function admin_created_user_email( $text ) {
	$roles = get_editable_roles();
	$role = $roles[ $_REQUEST['role'] ];
	/* translators: 1: Site name, 2: site URL, 3: role */
	return sprintf( __( 'Hi,
You\'ve been invited to join \'%1$s\' at
%2$s with the role of %3$s.
If you do not want to join this site please ignore
this email. This invitation will expire in a few days.

Please click the following link to activate your user account:
%%s' ), wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES ), home_url(), wp_specialchars_decode( translate_user_role( $role['name'] ) ) );
}