getDomains() is used to fetch all domain names that is supposed to support the ISC DNS journaling system. It's a simple GET command, but requires not only access to the API. It also requires a special permission as it lists all compatible domain names in the server pool. As migration progress goes forward more and more domain names will shop up in the list (migration is currently manually handled).
In the TorneAUTH API domain names has to be added to the user profile to get editing effect. Otherwise, no editing will be allowed.