ari.lt/content/js/handlers/user_account.js

async function user_account_create() {
    let username = prompt(`Enter your username`);
    let password = prompt(`Enter the password for '${username}'`);
    let password_confirm = prompt(`Confirm the password for '${username}'`);

    let tmp_boot_entries = {
        0: {
            "type": 'error',
            "text": "User account not created: canceled by user",
            "sleep_time": 0
        }
    }

    let valid = (
        username &&
        password &&
        password_confirm &&
        password.length > 6 &&
        password == password_confirm
    )

    if (!valid) {
        if (confirm('The credentials you entered are not valid (password/username too short or the password don\'t match), try again?')) {
            user_account_create();
            return 1;
        }

        add_boot_entry({0: tmp_boot_entries[0]});
        await sleep(2500);
    } else {
        alert('The next popup will show your credentials, press OK to proceed')
        let confirm_credentials = confirm(`Are these credentials correct?:
        USER: ${username}
        PASS: ${password}`);

        if (confirm_credentials) {
            localStorage.setItem('username', username)
            localStorage.setItem('password', hash(password))

            alert('Credentials saved!')
        }
    }
}