code: func (s *RepositoriesService) ListContributorsStats(ctx context.Context, owner, repo string) ([]*ContributorStats, *Response, error) {
  	u := fmt.Sprintf("repos/%v/%v/stats/contributors", owner, repo)
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	var contributorStats []*ContributorStats
  	resp, err := s.client.Do(ctx, req, &contributorStats)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return contributorStats, resp, nil
  }
docs: // ListContributorsStats gets a repo's contributor list with additions,
  // deletions and commit counts.
  //
  // If this is the first time these statistics are requested for the given
  // repository, this method will return an *AcceptedError and a status code of
  // 202. This is because this is the status that GitHub returns to signify that
  // it is now computing the requested statistics. A follow up request, after a
  // delay of a second or so, should result in a successful request.
  //
  // GitHub API docs: https://developer.github.com/v3/repos/statistics/#contributors