Not sure what you're trying to do - publish topics to NodeBB from another software?
Wonder if this will help you: https://github.com/psychobunny/nodebb-plugin-blog-comments
Lets you post a new topic (or reply to topics) from Ghost. I want to do WP in the future as well
Those userrs are stored in groups with special names, here are the names assuming the category id is 1.
You can get the user ids from these groups by.
Groups.getMembers('cid:1:privileges:find', 0, -1, callback); This will give you all the user ids that have the find permission for category 1.
If you want to get their basic info like username picture slug so you can show user icons you can just use Groups.getMemberUsers('cid:1:privileges:find', 0, -1, calllback);