Return Okta user ID and other user attributes in `postSubmit` registration hook

[joshuacollins-deloitte]

Describe the feature request

Currently, when a user account is created using self-service registration, there seems to be no way to gain information about the created Okta account from the frontend for analytics purposes.

The Okta SDK receives the ID of the newly created user in the API response from the /idp/idx/enroll/new call - it would be helpful if the widget made this information available in hooks.

Snippet of /new response:

{
<snip>
"user": {
        "type": "object",
        "value": {
            "id": "00ugquwxxjnxSPgM5697",
            "identifier": "user@email.com",
            "profile": {
                "firstName": "abc",
                "lastName": "123",
                "timeZone": "America/Los_Angeles",
                "locale": "en_US",
                "email": "u***r@email.com"
            }
        }
    },
</snip>
}

New or Affected Resource(s)

postSubmit registration hook

Provide a documentation link

https://github.com/okta/okta-signin-widget?tab=readme-ov-file#registration

Additional Information?

No response

[denysoblohin-okta]

Thanks for your feature request. Sounds reasonable. Internal ref: OKTA-749134