GoDaddy really lived up to its bad reputation and recently changed their API rules. The rules are simple: either you own 10 (or 50) domains, you pay $20/month, or you don’t get the API. I personally didn’t get any communication, and this broke my DDNS setup. I am clearly not the only one judging from what I found online. A company this big gating an API behind such a steep price… So I will repeat what many people said before me (being right): don’t. use. GoDaddy.
desec.io can be used with any domain registrar and has an API with support for various ddns clients (ddclient, lego).
Edit: To clarify, desec.io does not sell/rent domains. Desec has to be set as the authoritative nameserver on the registrar, then desec can manage domain records instead of the registrar (which usually also provides their own domain hosting for “free” by default).