curl --request POST \
  --url https://api.example.com/cabinet/admin/promocodes/deactivate-discount/{user_id} \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "message": "<string>",
  "user_id": 123,
  "deactivated_code": "<string>",
  "discount_percent": 0
}