curl --request DELETE \
  --url https://panel.sendcloud.sc/api/v3/integrations/{id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "errors": [
    {
      "status": "404",
      "code": "not_found",
      "title": "Not found",
      "detail": "The Integration could not be found with the search criteria given"
    }
  ]
}