dub-registry

[Ruby The Roobster]

I am currently trying to set up for myself a personal dub 
registry, and I have MongoDB installed.  Yet, when I run `dub 
run` in the repo directory, I get the following error message:

```
vibe.db.mongo.connection.MongoAuthException at C:\Users\User\AppData\Local\dub\packages\vibe-d-0.9.4\vibe-d\mongodb\vibe\db\mongo\connection.d(641): Authentication failed.
```

How can I configure MongoDB to stop this error from occurring?