curl --request GET \
  --url https://api.example.com/kalshi/positions

{
  "positions": [
    {
      "positionId": "<string>",
      "userId": "<string>",
      "marketId": "<string>",
      "side": "yes",
      "quantity": 123,
      "createdAt": 123,
      "updatedAt": 123
    }
  ]
}