I added the package to my meteor install, created a file in my /server dir with the name "mmj.mmjParticipants.collection.json"
When I try to read from the collection, I see:
(from a file I have called /lib/collections.js)
Participants = JSONCollections.mmjParticipants;
if (Participants.find().count() === 0) {
console.log("No participants.");
};