curl --request POST \
  --url 'https://api.elkapi.com/v1/images/generations' \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "gpt-image-1.5",
  "input": "今日は天気がよく、散歩にぴったりです。"
}'

{
  "created": 1,
  "data": [
    {
      "url": "https://example.com/image.png",
      "b64_json": "b64_json",
      "revised_prompt": "revised_prompt"
    }
  ]
}