Users with more than 30 email addresses get their emails truncated

[TimothyJones]

The GitHub API paginates responses with more than 30 items (see https://developer.github.com/v3/#pagination).

This means that users who have more than 30 emails associated with their account might not have a primary email address (if their primary email address is on a later page).

As far as I know, no one has hit this, but we should fix it before they do.