curl --request GET \
  --url https://api.{your-broker}.slate-labs.com/trader-days/summary

{
  "from": "2023-12-25",
  "to": "2023-12-25",
  "total_trader_days": 123,
  "unique_traders": 123,
  "by_owner": [
    {
      "owner_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "owner_name": "<string>",
      "trader_days": 123,
      "unique_traders": 123
    }
  ],
  "by_team": [
    {
      "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "team_name": "<string>",
      "trader_days": 123,
      "unique_traders": 123
    }
  ]
}