Create Account Information Store to my Database

Topic summary

A developer is attempting to dual-store customer signup data in both Shopify’s backend and their own external database. They’re working with a Shopify customer registration form that includes standard fields (first name, last name, email, password) plus a custom category field (Retail/Wholesaler).

Current Challenge:

  • Need to intercept form submission to send data to custom database
  • Unclear where to define API POST route for external storage
  • Currently using Shopify’s create_customer form

Technical Context:

  • Code snippet shows Liquid template markup for customer registration
  • Form includes custom category selection not native to Shopify
  • Appears to be exploring customer notes field as potential solution

Status: Question remains unanswered with no proposed solutions yet. The developer needs guidance on implementing a webhook, API endpoint, or middleware to capture and duplicate registration data to their database while maintaining Shopify’s native account creation.

Summarized with AI on November 13. AI used: claude-sonnet-4-5-20250929.

I need when the customer account signup the info store my db and shopify backend also. How can I achieve it I using the customer notes

This is the following code::
{% form ‘create_customer’ %}
{{ form.errors | default_errors }}

First name
Last name
Email
Password
Select Your Category?
{% endform %}

Where I define the my api post route so data store my db.