code: func (s *TeamsService) ListTeamMembers(ctx context.Context, team int64, opt *TeamListTeamMembersOptions) ([]*User, *Response, error) {
  	u := fmt.Sprintf("teams/%v/members", team)
  	u, err := addOptions(u, opt)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req.Header.Set("Accept", mediaTypeNestedTeamsPreview)
  
  	var members []*User
  	resp, err := s.client.Do(ctx, req, &members)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return members, resp, nil
  }
docs: // ListTeamMembers lists all of the users who are members of the specified
  // team.
  //
  // GitHub API docs: https://developer.github.com/v3/teams/members/#list-team-members