curl --request GET \
  --url https://external-api.kalshi.com/trade-api/v2/portfolio/subaccounts/transfers \
  --header 'KALSHI-ACCESS-KEY: <api-key>' \
  --header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
  --header 'KALSHI-ACCESS-TIMESTAMP: <api-key>'

{
  "transfers": [
    {
      "transfer_id": "<string>",
      "from_subaccount": 123,
      "to_subaccount": 123,
      "amount_cents": 123,
      "created_ts": 123
    }
  ],
  "cursor": "<string>"
}