Add-on: Dynu DNS (alternative to DuckDNS)

SSL stopped renewing for me. I get
[09:17:15] INFO: Get domain ID
[09:17:15] INFO: Creating TXT record.
[09:17:15] ERROR: Could not add TXT record.
ERROR: deploy_challenge hook returned with non-zero exit code

I figured it out. I have a free DYNU account and they limit the number of DNS records and the plugin couldn’t add the TXT record.

DuckDNS seems to be really unstable for us, so Iam looking for an alternative. So this is still working, yeah?

And I saw the MultiDDNS add-on, anyone else here is using and happy? (saw one reponse in this thread)

Is there a way to use ONLY Dynu? It keeps asking for a Duck token…