Use the JWT access_token obtained in "Get Authorization" to download the user's verification images.

The media_auth is the string returned upon a successful "Retrieve Webhook Resource Data" call for any media. For instance, if the media contains a selfie:

"steps": [
    {
      "status": 200,
      "id": "selfie",
      "data": {
        "selfiePhotoUrl": "https://media.prod.metamap.com/media/eyJhbGciOiJIUzI1NiIsInR5cC..."
      },
      "error": null
    }

The string eyJhbGciOiJIUzI1NiIsInR5cC... would be the media_auth.

A successful response is a return of all associated media.