How to delete an user including data from custom database tables

Hello guys!

i resolved this issue by using same hook add_action( ‘delete_user’,
‘my_delete_user’ );

here is my code

<?php

function my_delete_user( $user_id ) {
    global $wpdb;
    $user_obj = get_userdata( $user_id );

    $id_user = $user_obj->ID;
    $idsss = $user_obj->user_id;


    /*Delete Data from friend table*/  
    $query_friend= $wpdb->query("DELETE FROM `wp_user_friends` where `friend_id` = ".$user_obj->ID."");

    /*delete data from group*/
    $delete_group_table =$wpdb->query("DELETE FROM `wp_group` where `user_id` = ".$user_obj->ID."");


}
add_action( 'delete_user', 'my_delete_user' );
?>

Now it’s working perfect.