curl https://api.milesai.pro/v1/videos/generations \
  -H "Authorization: Bearer $MILES_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-imagine-video-1.5",
    "prompt": "A cinematic sunrise over the ocean",
    "duration": 5,
    "resolution": "720p"
  }'