curl --request DELETE \
  --url https://api.adullam.dev/v1/webhooks/{webhook_id} \
  --header 'Authorization: Bearer <token>'

{
  "error": {
    "type": "authentication_error",
    "code": "invalid_token",
    "message": "Invalid or expired access token",
    "request_id": "req_abc123"
  }
}