curl --request GET \
  --url https://openapi.ainvest.com/open/securities/etf/holdings \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "data": [
      {
        "date": "<string>",
        "total_weight": 123,
        "holdings": [
          {
            "ticker": "<string>",
            "constituent_weight": 123
          }
        ]
      }
    ]
  },
  "status_code": 123,
  "status_msg": "<string>"
}