apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/OidcLocalUserServiceImpl.java/OidcLocalUserServiceImpl/searchUsers
class OidcLocalUserServiceImpl:  @Override
  public List<UserInfo> searchUsers(String keyword, int offset, int limit) {
    List<UserPO> users = this.findUsers(keyword);
    if (CollectionUtils.isEmpty(users)) {
      return Collections.emptyList();
    }
    return users.stream().map(UserPO::toUserInfo)
        .collect(Collectors.toList());
  }