Most of the fields are taken directly from github, but here are some descriptions for the ones we added:
repos: All of the user's public repositoriesranked_repos_by_language: Total number of ranked repositories committed to, by languageranked_repos_contributed_to: A list of ranked repositories contributed to.commits: Total number of commits to all ranked reposranked_repos_by_language_commits: Total number of commits to ranked repos, by language