User Principal.js

export default class User {

    constructor(username, email, password_hash, session_token) {
        this.username = username;
        this.email = email;
        this.password_hash = password_hash;
        this.session_token = session_token;
    }

    isAuthenticated() {
        return !!this.session_token;
    }

}

const initialState = {
    principal: new User('Guest', null, null, null)
};