Is there a meteor.js library available for managing user accounts?
I'd like to have users register, have access to unique user IDs to limit the number of times a single user can do something, and also have different tiers of users to control access. It would be great if I didn't have to build this out myself.
Have a look at the accounts api, and the passwords package, which should save you writing most of the boilerplate code for implementing user accounts.
There is also the accounts-ui package with support for facebook, google, and others.
You'll need to implement your own ACL and make sure collections have appropriate permissions.
Finally have a look at the All Tomorrow's Parties demo for some sample implementation.