curl --request GET \
  --url https://api.sprucecollective.co.uk/points/balance/{user_id} \
  --header 'Authorization: <api-key>'

{
  "available_points": 123,
  "expired_points": 123,
  "pending_points": 123,
  "point_items": [
    {
      "created_at": "<string>",
      "item_id": "<string>",
      "payment_transaction_id": "<string>",
      "point_id": "<string>",
      "purchase_cost_cents": 123,
      "purchase_currency": "<string>",
      "quantity": 123
    }
  ],
  "total_points": 123,
  "user_id": "<string>"
}