code: func (s *AdminService) GetAdminStats(ctx context.Context) (*AdminStats, *Response, error) {
  	u := fmt.Sprintf("enterprise/stats/all")
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	m := new(AdminStats)
  	resp, err := s.client.Do(ctx, req, m)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return m, resp, nil
  }
docs: // GetAdminStats returns a variety of metrics about a Github Enterprise
  // installation.
  //
  // Please note that this is only available to site administrators,
  // otherwise it will error with a 404 not found (instead of 401 or 403).
  //
  // GitHub API docs: https://developer.github.com/v3/enterprise-admin/admin_stats/