如何更改loopback 4中关于密码长度的HTTP错误？

import {Validator} from '@loopback/validation';

export class PasswordValidator implements Validator<string> {
  validate(value: string) {
    if (value.length < 8) {
      throw new Error('密码长度必须至少为8个字符。');
    }
  }
}

import {model, property, validate} from '@loopback/repository';

@model()
export class User extends Entity {
  @property({
    type: 'string',
    required: true,
  })
  @validate(PasswordValidator)
  password: string;
}