Mongo

Properly looking up certain users and put an index on the user id.
Just for the sake of double checking I'm assuming this ID value is the user's unique ID as provided by the GitHub API, correct?

> **Get the authenticated user**
>
>     GET /user
>
> *Response*
>
>     {
>       "login": "octocat",
>       "id": 1,
>       ...
>     }

https://developer.github.com/v3/users/