@sergiohenrique27, it’s probably not necessary to recover the credentials that it’s referring to; you could simply get a new certificate. Can you tell us what command you’re trying to run to get the certificate?
@sergiohenrique27, in your original post you mentioned the error that Certbot gave you. Was there more to this message? After
Domain: api.mydeal.com.br
Type: unauthorized
there should also be a “Detail” field providing more information about what went wrong. If you do not see such a field, could you provide a full log of the issue? Logs by default are saved in /var/log/letsencrypt. Feel free to redact any information such as e-mail addresses, IP addresses, or domain names from your logs as you feel appropriate.