curl --location --request POST 'https://async.koukoutu.com/v1/create' \
--header 'X-API-Key: api 密钥' \
--data-urlencode 'model_key=background-removal' \
--data-urlencode 'image_url=https://www.test.com/123.jpg' \
--data-urlencode 'output_format=webp' \
--data-urlencode 'crop=0' \
--data-urlencode 'border=0' \
--data-urlencode 'stamp_crop=0'