Add profileData key to UserIdentity

[davidwarshaw]

Description

The key profileData is present in social Identities (see below), but is not in the UserIdentity struct. This means that this SDK cannot be used to retrieve social profile data.
Here's an example of the key within an account with two identities:

...
  "identities": [
    {
      "connection": "Initial-Connection",
      "user_id": "123xyz",
      "provider": "auth0",
      "isSocial": false
    },
    {
      "connection": "google-oauth2",
      "user_id": "abc123",
      "provider": "google-oauth2",
      "isSocial": true,
      "profileData": {
         "family_name": "some name",
         "picture": "https://cdn.googleusercontent.com/user/abc123"
      }
    }
  ],
...

This PR adds a profileData field to UserIdentity with type *map[string]interface{} so arbitrary schemas of social providers can be deserialized.

References

This PR was motivated by this thread on the community forum: https://community.auth0.com/t/identity-profiledata-field-not-in-management-api-useridentity/78948

Testing

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have read and agreed to the terms within the Auth0 Code of Conduct.
• I have read the Auth0 General Contribution Guidelines.
• I have reviewed my own code beforehand.
• I have added documentation for new/changed functionality in this PR.
• All active GitHub checks for tests, formatting, and security are passing.
• The correct base branch is being used, if not main.

[davidwarshaw]

@sergiughf it would be helpful for us to get this added. Please take a look.

[sergiught]

Hey @davidwarshaw, apologies as this completely skipped my radar. I'll take a look at this today.

[sergiught]

Fixes: #34.

@davidwarshaw The contribution looks good, thanks! I just refactored a little bit the tests in:

• Refactor UserIdentity UnmarshalJSON test.

Let me know if you have any questions.

Apologies for the time it took to review this! I'll wrap a few more open PRs and / or github issues and I'll make a release with this soon. Stay tuned:)

[sergiught]

Note for other reviewers: This is failing cuz it's coming from a fork and doesn't have access to the secrets for the integration tests.