MMM Username Registration API

A WordPress plugin that exposes a REST API endpoint for user registration, designed for use with Elementor forms and WP-Members.

Features

• REST endpoint at POST /wp-json/mmm/v1/register
• Accepts JSON or form-encoded body, including Elementor's nested fields structure
• Creates new users with subscriber role and WP-Members pending activation state
• If email already exists and last name matches, updates the user's contact info instead of creating a duplicate
• Auto-generates a username (firstinitial + lastname) if none provided, with numeric suffix to avoid conflicts
• Maps submitted fields to WP-Members and WooCommerce-compatible user meta keys
• All error cases return silent success (200) to avoid exposing registration state to bots

Requirements

• WordPress 5.0+
• PHP 7.4+
• WP-Members plugin

Installation

1. Upload the wp-members-update-creates-user folder to /wp-content/plugins/
2. Activate the plugin through the Plugins menu in WordPress
3. Point your Elementor form's webhook action to /wp-json/mmm/v1/register

Note: If upgrading from a version where the main file was named wp-members-update-create.php, deactivate the old plugin and activate the renamed version.

Endpoint

POST /wp-json/mmm/v1/register
Content-Type: application/json

Accepted Fields

Security Notes

• The endpoint is publicly accessible (permission_callback: __return_true) by design — it is a registration endpoint
• All input is sanitized before use or storage
• Silent 200 responses on all error paths prevent enumeration of existing users

Changelog

3.1

• Renamed main file to match plugin folder name (wp-members-update-creates-user.php)
• Standardized ABSPATH guard syntax
• Added plugin header fields: Requires at least, Requires PHP, Tested up to
• Added README.md

3.0

• Added support for existing user update (matched by email + last name)
• Added Elementor nested field flattening

Earlier

• Initial registration endpoint