Use the Identify API to attach a known email or external identity to an existing quiz visitor after checkout or login.
Reference Workflow

- Collect the quiz session or user identifier.
- Send the known identity to the API from a secure server or approved pixel.
- Avoid exposing secrets in storefront code.
- Review the profile after processing.
- Verify downstream sync.
After completing the workflow, review the related bluebarry screen or connected system to confirm the change is visible.