curl --request GET \
  --url https://api.courier.com/users/{user_id}/preferences \
  --header 'Authorization: Bearer <token>'

{
  "paging": {
    "cursor": "<string>",
    "more": true
  },
  "items": [
    {
      "custom_routing": [
        "direct_message"
      ],
      "default_status": "OPTED_IN",
      "has_custom_routing": true,
      "status": "OPTED_IN",
      "topic_id": "<string>",
      "topic_name": "<string>"
    }
  ]
}