curl --request GET \
  --url https://api.athenahq.ai/api/v1/credits/group \
  --header 'x-api-key: <api-key>'

{
  "credits": {
    "total": 500,
    "monthly": {
      "balance": 300,
      "next_reset_at": 1772227690021
    },
    "one_off": {
      "balance": 200
    }
  }
}