curl --request POST \
  --url https://api.anysite.io/api/niconico/users \
  --header 'Content-Type: application/json' \
  --header 'access-token: <api-key>' \
  --data '
{
  "user": "<string>",
  "timeout": 300
}
'

[
  {
    "id": "<string>",
    "url": "<string>",
    "@type": "NiconicoUser",
    "nickname": "<string>",
    "description": "<string>",
    "image": "<string>",
    "cover_image": "<string>",
    "follower_count": 123,
    "followee_count": 123,
    "user_level": 123,
    "is_premium": false,
    "registered_version": "<string>",
    "sns": []
  }
]