curl --request GET \
  --url https://api.happenstance.ai/v1/usage \
  --header 'Authorization: Bearer <token>'

{
  "balance_credits": 123,
  "has_credits": true,
  "purchases": [
    {
      "id": "<string>",
      "credits": 123,
      "purchased_at": "<string>"
    }
  ],
  "usage": [
    {
      "id": "<string>",
      "credit_used": 123,
      "created_at": "<string>",
      "resource_id": "<string>",
      "resource_type": "<string>"
    }
  ],
  "auto_reload": {
    "enabled": true,
    "threshold_credits": 123,
    "reload_credit_amount": 123,
    "last_reload_at": "<string>"
  }
}