curl --request POST \
  --url https://api.highwayapi.ai/v3/gemini-2.5-flash-image-text-to-image \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "prompt": "<string>",
  "aspect_ratio": "<string>"
}
'

{
  "image_urls": [
    "<string>"
  ]
}