Primeiro pagamento:
waiting_payment → authorized → settled
waiting_payment → expired

Cobranças recorrentes:
scheduled → waiting_payment → authorized → settled
scheduled → waiting_payment → refused → scheduled (retry automático)
scheduled → error

processing → authorized → sent_for_settle → settled
processing → refused
authorized → refund_requested → refunded
authorized → chargeback_notification → chargeback

waiting_payment → authorized → sent_for_settle → settled
waiting_payment → expired
authorized → refund_requested → refunded

{
  "message": "Pagamento não encontrado."
}

{
  "message": "The given data was invalid.",
  "errors": {
    "email": ["O campo email é obrigatório."]
  }
}