Not only ListDatabaseNames has bug and return nil document, but also ListCollectionNames call from an opened database return nil document. I am able to show evidence and use case text code.
It is incredible there is no issues places in your github repo to publicate an issue notice.
The commercial chat by the time is working perfectly.
I have to build web-site for sale to clients, but i scare with Atlas company to just paid to speak with commercial and loose time and money to try to test your code without any return in a forum.