curl --request GET \
  --url https://api.production.hyperoru.com/api/klines/coverage \
  --header 'Authorization: Bearer <token>'

{
  "coverage": [
    {
      "environment": "<string>",
      "exchange": "<string>",
      "period": "<string>",
      "symbol": "<string>",
      "newest": "<string>",
      "oldest": "<string>",
      "total_candles": 123
    }
  ]
}