Remove user and all its posts - wordpress

Question

I need to use WordPress Rest API to delete a user and all its own (maybe custom) posts.
I tried to call <url_base>/wp/v2/users/<id> and I have to provide a further parameter ?reassign=USER_ID to reassign its posts to another user.
A silly solution should be adding a "garbage" user to the system and assign him all deleted posts. Then I can create a job to delete all posts. It seems a very stupid way to me.. :(
I just want to delete them. I can do it from WP admin panel... why I can't via Rest Api?
Thanks
EDIT
Passing "reassign" as an empty params (null is not accepted...) the API informs me that I'm not able to delete my own profile. I'm testing it as a subscriber (end user), but I need to be able to manage and delete my own data... Am I wrong?!

Answer 1

This is my solution... maybe not the best one, but it seems to work.
I added delete_users and remove_users capabilities to the Subscriber role (for my convenience).
My /DeleteUsers rest endpoint check for the user ID encrypted inside the JWT token that is sent in header and compare it with the user_id params. If they match, I can delete the user.
Now I just have to avoid that a user can access the WP Admin panel and make some mess!
This is the code:
function myDeleteProfile($data) {
require_once(ABSPATH.'wp-admin/includes/user.php');
$headers = getallheaders();
if(!isset($headers['Authorization']) || !$headers['Authorization']) {
return array('esito'=>'ko', 'descrizione'=>'Fail message!');
}
$jwt_parts = preg_split('/\./', $headers['Authorization']);
$jwt_decoded = json_decode(base64_decode($jwt_parts[1]));
$jwt_user = $jwt_decoded->data->user->id;
if( intval($data['user_id']) != intval($jwt_user) ) {
return array('esito'=>'ko', 'descrizione'=>'User cannot delete.');
}
else {
if( wp_delete_user($jwt_user,null) ){
return array('esito'=>'ok', 'descrizione'=>'Deleting...');
}
else {
return array('esito'=>'ko', 'descrizione'=>'Error.');
}
}
}