curl --request POST \
  --url https://api.bfl.ai/v1/flux-pro-1.0-canny \
  --header 'Content-Type: application/json' \
  --header 'x-key: <api-key>' \
  --data '{
  "prompt": "ein fantastisches bild",
  "control_image": "<string>",
  "preprocessed_image": "<string>",
  "canny_low_threshold": 250,
  "canny_high_threshold": 250,
  "prompt_upsampling": true,
  "seed": 42,
  "steps": 32,
  "output_format": "jpeg",
  "guidance": 50.5,
  "safety_tolerance": 2,
  "webhook_url": "<string>",
  "webhook_secret": "<string>"
}'

{
  "id": "<string>",
  "polling_url": "<string>"
}