curl --request GET \
  --url https://app.duix.ai/duix-openapi-v2/sdk/v2/getconcurrentNumber \
  --header 'token: <api-key>'

{
  "code": "200",
  "data": {
    "cropId": "your-crop-id",
    "totalConcurrentNumber": 10,
    "userConcurrentNumber": 10
  },
  "message": "",
  "success": true
}