For anyone looking to do this for a plugin, it's easy enough using getObjectValues()
var db = require.main.require('./src/database')
var User = require.main.require('./src/user')
db.getObjectValues('steamid:uid', function (err, uids) {
if (err) return console.log(err)
uids = uids.sort().filter(function(item, pos, ary) {
return !pos || item != ary[pos - 1]
})
User.getUsersFields(uids, ['username', 'email', 'steamid', 'profileurl'], function (err, users) {
if (err) return console.log(err)
users.forEach(function (user) {
// Do a thing here.
console.dir(user)
})
})
})