text: const USER_NAME_ALREADY_EXISTS = '用户名已存在'
  const REGISTER_FAIL = '注册失败'
  const USER_NAME_KEY_NULL = '用户名字段不能为空'
  const USER_NAME_VAL_NULL = '用户名不能为空'
  const PWD_KEY_NULL = '密码字段不能为空'
  const PWD_VAL_NULL = '密码不能为空'
  
  const USER_NAME_NOT_ALREADY_EXISTS = '用户名不存在'
  const PWD_IS_ERR = '密码错误'
  const TOKEN_INVALID = '无效的Token'
  const UN_PERMISSION = '没有权限联系管理员'
  const NOT_FOUND = 404
  const JSON_SCHEMA_FAIL = `数据格式校验错误`
  module.exports = {
    USER_NAME_KEY_NULL,
    USER_NAME_VAL_NULL,
    PWD_KEY_NULL,
    PWD_VAL_NULL,
    USER_NAME_ALREADY_EXISTS,
    USER_NAME_NOT_ALREADY_EXISTS,
    PWD_IS_ERR,
    TOKEN_INVALID,
    UN_PERMISSION,
    NOT_FOUND,
    REGISTER_FAIL,
    JSON_SCHEMA_FAIL,
  }
  