code: func (s *IdentityService) GetUsers() ([]services.User, error) {
  	startKey := backend.Key(webPrefix, usersPrefix)
  	result, err := s.GetRange(context.TODO(), startKey, backend.RangeEnd(startKey), backend.NoLimit)
  	if err != nil {
  		return nil, trace.Wrap(err)
  	}
  	var out []services.User
  	for _, item := range result.Items {
  		if !bytes.HasSuffix(item.Key, []byte(paramsPrefix)) {
  			continue
  		}
  		u, err := services.GetUserMarshaler().UnmarshalUser(
  			item.Value, services.WithResourceID(item.ID), services.WithExpires(item.Expires))
  		if err != nil {
  			return nil, trace.Wrap(err)
  		}
  		out = append(out, u)
  	}
  	return out, nil
  }
docs: // GetUsers returns a list of users registered with the local auth server