How to check if two password are equal using invalid.

validate-user.js

const user = await isvalid(/* data */, 
  {
    type: Object,
    schema: {
      'username': { /* username validators */ },
      'password': { type: String, required: true, match: /* some regular expression */ },
      'password_repeated': { type: String, required: true }
    },
    post: (obj) {
      if (obj.password !== obj.password_repeated) {
        throw new Error('Passwords must be the same.');
      }
    }
  };