I posted a question on URLO, but then realized that the people who actually did the work are probably more likely to hang out here, on internals.
I'm trying to use the cargo:macos-keychain credential provider, but am unable to find any documentation on how to format the keychain item so that cargo will find it. A code comment states that the "account name" is "not used", but the account name is a required field when creating an item. (Is it "not used" in the sense that it's a lookup where an empty field matches any entry?). Perhaps more importantly, when I try to create an item using the cargo-registry: prefix, I get a pretty broken keychain item.
Is there a step-by-step guide on using the credential providers? (How to format the Keychain items, in particular).