apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/po/UserPO.java/UserPO/toUserInfo
class UserPO:  public UserInfo toUserInfo() {
    UserInfo userInfo = new UserInfo();
    userInfo.setUserId(this.getUsername());
    userInfo.setName(this.getUserDisplayName());
    userInfo.setEmail(this.getEmail());
    return userInfo;
  }