password creation

password.js

```

  async register ({ request, response, transform, auth }) {

    const validation = await validate(request.only(Retailer.validateFields), Retailer.rules, Retailer.messages)

    if (validation.fails()) {
        return response.status(422).json({errors: validation.messages()})
    }

    // Validate password
    const passwordValidation = new PasswordPolicy({
      containsAtLeast: {
        atLeast: 3,
        expressions: [ charsets.lowerCase, charsets.upperCase, charsets.numbers ]
      }
    })

    if(passwordValidation.check(request.input('password')) === false) {
      return response.status(401).json({error: 'Password does not met the minimum requirements.'})
    }
```