curl --request GET \
  --url https://api.decodahealth.com/internal-billing/usage/daily \
  --header 'API-KEY: <api-key>' \
  --header 'TENANT: <tenant>'

{
  "items": [
    {
      "date": "<string>",
      "quantity": 123,
      "description": "<string>",
      "unitPrice": 123,
      "amount": 123,
      "pricingId": "<string>"
    }
  ],
  "freeUsage": [
    {
      "quantity": 123,
      "description": "<string>"
    }
  ]
}