curl --request POST \
  --url https://api.callaro.ai/api/v1/billing/grant-free-prepaid-credits \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "accountable_type": "Partner",
  "accountable_id": "<string>",
  "amount": 123,
  "description": "<string>",
  "issue_zero_value_invoice": true
}
'

{
  "data": {},
  "message": "<string>",
  "meta": {},
  "request_id": "<string>"
}