An example of publications and subscriptions

browser vs server

// browser
> Meteor.users.findOne()
{
  _id: "1234"
}

// console
> Meteor.users.findOne()
{
  _id: "1234",
  profile: {
    name: "Jack Sparrow"
  },
  services: [{
    github: {
      token: "56789",
      username: "Jack Sparrow"
    }
  }]

client.js

Tracker.autorun(function() {
  Meteor.subscribe('userdata');
})

server.js

Meteor.publish('userdata', function() {
  return Meteor.users.find({}. {
    fields: {
      _id: true
    }
  });
});