curl --request GET \
  --url https://api.utage-system.com/v1/accounts/{account_id}/line/friends \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "display_name": "<string>",
      "picture_url": "<string>",
      "is_blocked": true,
      "is_exclusion": true,
      "unread_count": 123,
      "message_tracking_name": "<string>",
      "last_acted_at": "<string>",
      "created_at": "<string>"
    }
  ],
  "meta": {
    "current_page": 123,
    "per_page": 123,
    "total": 123
  }
}