Create Wordpress user when new custom post created - wordpress

Question

I want to create custom posts from frontend and backend. And while I create posts I want to create users. At frontend I use form and wp_insert_post so it creates post as I need. At backend I use this code:
add_action( 'publish_user_contact', 'custom_post_user_create', 1, 3);
function custom_post_user_create($post_id){
$user_login_id = 'user_'.random_int(100000, 999999);
update_post_meta($post_id, 'idr_contact_user_id', $user_login_id);
$password = wp_generate_password( 10, true, true );
if (!empty($_POST['contact_email'])){
$userdata = [
'user_login' => "$user_login_id",
'user_pass' => "$password",
'user_email' => $_POST['contact_email'],
'display_name' => sanitize_text_field( $_POST['contact_first_name'] .' '. $_POST['contact_last_name'] ),
'first_name' => sanitize_text_field( $_POST['contact_first_name'] ),
'last_name' => sanitize_text_field( $_POST['contact_last_name'] )
];
} else {
$userdata = [
'user_login' => "$user_login_id",
'user_pass' => "$password",
'display_name' => sanitize_text_field( $_POST['contact_first_name'] .' '. $_POST['contact_last_name'] ),
'first_name' => sanitize_text_field( $_POST['contact_first_name'] ),
'last_name' => sanitize_text_field( $_POST['contact_last_name'] )
];
}
$user_id = wp_insert_user( $userdata );
}
It creates user with custom post nut when I try to edit posts it creates more users. I tried to use new_to_publish, but it doesn't work (users don't creates). I tried to use save_post but it makes duplicates too.
How to prevent duplicates?

Answer 1

Try adding a check for the custom field, then the code won't be executed when editing a post.
add_action( 'publish_user_contact', 'custom_post_user_create', 1, 3);
function custom_post_user_create($post_id){
$user_login_id = 'user_'.random_int(100000, 999999);
if(get_post_meta($post_id, "idr_contact_user_id", true) ) {
return;
}
update_post_meta($post_id, 'idr_contact_user_id', $user_login_id);
$password = wp_generate_password( 10, true, true );
if (!empty($_POST['contact_email'])){
$userdata = [
'user_login' => "$user_login_id",
'user_pass' => "$password",
'user_email' => $_POST['contact_email'],
'display_name' => sanitize_text_field( $_POST['contact_first_name'] .' '. $_POST['contact_last_name'] ),
'first_name' => sanitize_text_field( $_POST['contact_first_name'] ),
'last_name' => sanitize_text_field( $_POST['contact_last_name'] )
];
} else {
$userdata = [
'user_login' => "$user_login_id",
'user_pass' => "$password",
'display_name' => sanitize_text_field( $_POST['contact_first_name'] .' '. $_POST['contact_last_name'] ),
'first_name' => sanitize_text_field( $_POST['contact_first_name'] ),
'last_name' => sanitize_text_field( $_POST['contact_last_name'] )
];
}
$user_id = wp_insert_user( $userdata );
}