Help Needed with Sample Method in Gremlin-Go

func (r userRepository) GetNRandomUsers(qty int, ignoreIds []string, microverseId string) ([]string, error) {
    users := r.g.Users()
    if microverseId != "" {
        users.Filter(__.UserInMultiverse(microverseId))
    }
    if len(ignoreIds) > 0 {
        users.Not(__.HasId(ignoreIds))
    }
    queryResponse, err := users.Id().Sample(qty).Next()
    if err != nil {
        return nil, err
    }
    return queryResponse.GetInterface().([]string), nil
}