Login WP - Connect single field to an external api - wordpress

Question

I made a plugin to allow wordpress login with external api.
Everything works, now what I have to do is that when a user logs in for the first time, the plugin checks to see if it is already present on wp, and where it was not already present, it creates a new user by taking behind username, email and password.
The new user is created but I would like it to bring with it also the id field from the external api saving it in an ACF field.
This is the code created so far:
function au_auth($user, $username, $password)
{
$options = get_option('au_options');
$endpoint = $options['au_apiurl'];
$user_email_key = 'email';
$password_key = 'password';
// Makes sure there is an endpoint set as well as username and password
if (!$endpoint || $user !== null || (empty($username) && empty($password))) {
return false;
}
// Check user exists locally
$user_exists = wp_authenticate_username_password(null, $username, $password);
if ($user_exists && $user_exists instanceof WP_User) {
$user = new WP_User($user_exists);
return $user;
}
// Build the POST request
$login_data = array(
$user_email_key => $username,
$password_key => $password
);
$auth_args = array(
'method' => 'POST',
'headers' => array(
'Content-type: application/x-www-form-urlencoded'
),
'sslverify' => false,
'body' => $login_data
);
$response = wp_remote_post($endpoint, $auth_args);
// Token if success; Not used right now
$response_token = json_decode($response['response']['token'], true);
$response_code = $response['response']['code'];
if ($response_code == 400) {
// User does not exist, send back an error message
$user = new WP_Error('denied', __("<strong>Error</strong>: Your username or password are incorrect."));
} else if ($response_code == 200) {
// External user exists, try to load the user info from the WordPress user table
$userobj = new WP_User();
// Does not return a WP_User object but a raw user object
$user = $userobj->get_data_by('email', $username);
if ($user && $user->ID) {
// Attempt to load the user with that ID
$user = new WP_User($user->ID);
}
} else {
// The user does not currently exist in the WordPress user table.
// Setup the minimum required user information
$userdata = array(
'user_email' => $username,
'user_login' => $username,
'user_pass' => $password
);
// A new user has been created
$new_user_id = wp_insert_user($userdata);
// Assign editor role to the new user (so he can access protected articles)
wp_update_user(
array(
'ID' => $new_user_id,
'role' => 'editor'
)
);
// Load the new user info
$user = new WP_User ($new_user_id);
}
}
// Useful for times when the external service is offline
remove_action('authenticate', 'wp_authenticate_username_password', 20);
return $user;
}
Anyone have any way how to help me?

Answer 1

Resolved! I hope this will help those who have found themselves in the same situation as me:
add_filter('authenticate', 'au_auth', 10, 3);
add_filter('register_new_user', 'au_registration', 10, 3);
// add_filter('profile_update', 'au_profile_update', 10, 3);
// add_filter('edit_user_profile_update', 'au_profile_edit', 10, 3);
function au_auth($user, $username, $password)
{
$options = get_option('au_options');
$endpoint = $options['au_apiurl'];
// Makes sure there is an endpoint set as well as username and password
if (!$endpoint || $user !== null || (empty($username) && empty($password))) {
return false;
}
$auth_args = [
'method' => 'POST',
'headers' => [
'Content-type: application/x-www-form-urlencoded',
],
'sslverify' => false,
'body' => [
'email' => $username,
'password' => $password,
],
];
$response = wp_remote_post($endpoint, $auth_args);
// Token if success; Not used right now
$response_token = json_decode($response['response']['token'], true);
$body = json_decode($response['body'], true);
$response_status_code = $response['response']['code'];
$success = $body !== 'KO';
if (!$success) {
// User does not exist, send back an error message
$user = new WP_Error('denied', __('<strong>Error</strong>: Your username
or password are incorrect.'));
} elseif ($success) {
$idExternal = $body['Id'];
$nome = $body['Name'];
$cognome = $body['Surname'];
$email = $body['Email'];
$userobj = new WP_User();
$user = $userobj->get_data_by('email', $email);
if ($user && $user->ID) {
$user = new WP_User($user->ID);
} else {
$userdata = [
'user_email' => $email,
'user_login' => join(' ', [$name, $surname]),
'user_pass' => '----',
];
$new_user_id = wp_insert_user($userdata);
$new_user_composite_id = 'user_' . $new_user_id;
update_field('field_60084ad3970a8', $idExternal, $new_user_composite_id);
update_field('field_5f22ca201c7b0', $name, $new_user_composite_id);
update_field('field_5f22ccd498f40', $surname, $new_user_composite_id);
update_field('field_5f22ce7b7c1db', $email, $new_user_composite_id);
$user = new WP_User($new_user_id);
}
}
remove_action('authenticate', 'wp_authenticate_username_password', 20);
return $user;
}