curl --request POST \
  --url https://discord.com/api/v10/webhooks/{webhook_id}/{webhook_token}/slack \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "<string>",
  "username": "<string>",
  "icon_url": "<string>",
  "attachments": [
    {
      "title": "<string>",
      "title_link": "<string>",
      "text": "<string>",
      "color": "<string>",
      "ts": 123,
      "pretext": "<string>",
      "footer": "<string>",
      "footer_icon": "<string>",
      "author_name": "<string>",
      "author_link": "<string>",
      "author_icon": "<string>",
      "image_url": "<string>",
      "thumb_url": "<string>",
      "fields": [
        {
          "name": "<string>",
          "value": "<string>",
          "inline": true
        }
      ]
    }
  ]
}
'

"<string>"