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

{
  "fills": [
    {
      "fill_id": "<string>",
      "trade_id": "<string>",
      "order_id": "<string>",
      "client_order_id": "<string>",
      "ticker": "<string>",
      "market_ticker": "<string>",
      "side": "yes",
      "action": "buy",
      "count": 123,
      "price": 123,
      "yes_price": 123,
      "no_price": 123,
      "yes_price_fixed": "<string>",
      "no_price_fixed": "<string>",
      "is_taker": true,
      "created_time": "2023-11-07T05:31:56Z",
      "ts": 123
    }
  ],
  "cursor": "<string>"
}