curl --request GET \
  --url https://v2-nova-api.prod.czmx.in/org/{org_id}/billing/balance

{
  "billing_tier_id": "<string>",
  "credits_balance": {
    "exp": 123,
    "infinityModifier": 1,
    "int": {},
    "naN": true,
    "valid": true
  }
}