leaky objects Revealing Module Pattern

Probably already exists but I want something that uses revealing Module Pattern javascript convention to find 'leaky' objects which are giving users access to commands that they shouldn't be able to use

I dunno but

imagine

userObject.js
```
 function User(username,password) {

this.username:username,
this.password: password
}

module.exports =  User

```

userNicky.js
```
//let Nick =new  User(Nicky,12321332) creates the user

let User = require('./userObject.js')

Nick = {
username:Nicky
password:12321332
}

module.exports=Nick      //should only export Nick.username
```

window.js
```
let nickname = require('./userNicky')

console.log(`this user is called ${nickname.username}`)

```

but this would still allow you to see the password property of the nickname object

so console.log(nickname.password) would let us see the password of username