@CameronWise I have also now received the following information from GoDaddy support and have asked them to update their API document to reflect this change. I have explained to them that thousands of certificate renewals will fail as a result of this change:
We have recently updated the account requirements to access parts of our production Domains API. As part of this update, access to these APIs are now limited:
Availability API: Limited to accounts with 50 or more domains Management and DNS APIs: Limited to accounts with 10 or more domains and/or an active Discount Domain Club plan.If you have lost access to these APIs, but feel you meet these requirements, please reply back with your account number and we will review your account and whitelist you if we have denied you access in error.