curl --request GET \
  --url https://api.formo.so/v0/boards/{boardId}/charts/{chartId} \
  --header 'Authorization: Bearer <token>'

{
  "id": "cht_x1y2z3a4b5c6",
  "project_id": "proj_abc123",
  "board_id": "brd_a1b2c3d4e5f6",
  "chart_type": "line",
  "title": "Daily revenue (last 30 days)",
  "description": null,
  "query": "SELECT toDate(timestamp) AS day, sum(revenue) AS revenue FROM events WHERE event = 'transaction' AND timestamp >= now() - INTERVAL 30 DAY GROUP BY day ORDER BY day",
  "x_axis": "day",
  "y_axis": [
    "revenue"
  ],
  "group_by": null,
  "steps": null,
  "settings": null
}