如何拓展lin_user表字段
我尝试在 /models/user.js 添加字段 添加后删除数据库并重启 没有期望的字段出现
```javascript
const { modelExtend } = require('lin-mizar/lin/factory');
const { UserInterface } = require('lin-mizar/lin/interface');
const { User } = require('lin-mizar');
const Sequelize = require('sequelize');

modelExtend(UserInterface, {
  openid: {
    type: Sequelize.STRING(64),
    allowNull: true
  },
  testId: {
    type: Sequelize.STRING,
    defaultValue: 0
  }
});

User.prototype.sayHello = function () {
  console.log('hello world!');
};

module.exports = { User };

```