curl --request GET \
  --url https://api.ledgerbeam.com/v1/billing/credit-history \
  --header 'API-KEY: <api-key>'

{
  "next_cursor": "XjdHaksD",
  "data": [
    {
      "date": "2024-01-15",
      "credits_used": 150,
      "credits_remaining": 850,
      "total_credits": 1000
    }
  ],
  "summary": {
    "total_credits_used": 5000,
    "current_credits": 500,
    "period_start": "2024-01-01",
    "period_end": "2024-01-31"
  }
}