code: func (p *ProfilesClient) ListByID(ctx context.Context, userIDs []identity.ID) ([]apitypes.Profile, error) {
  	v := &url.Values{}
  	for _, id := range userIDs {
  		v.Add("id", id.String())
  	}
  
  	var results []apitypes.Profile
  	err := p.client.RoundTrip(ctx, "GET", "/profiles", v, nil, &results)
  	return results, err
  }
docs: // ListByID returns profiles looked up by User ID