curl --request GET \
  --url https://api.tkhub.ai/v1/kling/v1/videos/text2video/{task_id} \
  --header 'Authorization: Bearer <token>'

{
  "task_id": "abcd1234efgh",
  "status": "completed",
  "url": "https://example.com/video.mp4",
  "format": "mp4",
  "metadata": {
    "duration": 5,
    "fps": 30,
    "width": 1280,
    "height": 720,
    "seed": 20231234
  },
  "error": {
    "code": 123,
    "message": "<string>"
  }
}