`${USER_NAME}` is coming from `ENV['GIT_COMMITTER_NAME']` which is commonly a full name and not the GitHub username. We'd need to find a different solution to make this work. I might also be uploading this to an organisation repository such as CocoaPods or AFNetworking. So would be nice to be able to change the `git` username.

Since we're doing this here, we should set the source from example to `https://github.com/username/podname`.