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

{
  "data": {
    "data": [
      {
        "ticker": "<string>",
        "ex_date": "<string>",
        "pay_date": "<string>",
        "amount": 123
      }
    ]
  },
  "status_code": 123,
  "status_msg": "<string>"
}