Created Github API using Octokit

I have created Github Api using Octokit. Please review and let me know the comments.
I added these classes for additional functionality. Presently we are doing direct functionality on all these hardcore labels such as commits, issues etc., Which means we are getting their counts only. In future, for commits,  if you want to do some other functionality like getting commits before a specific date or getting commits after a specific date, we can have in that particular class Commit. Presently its only one thing we are doing so i just have it in Base class. Please let me know your thought in this.