addressbook/templates/admin/users_add.html.php

<?php include dirname(path: __DIR__) . '/_header.html.php'; ?>

<form method="POST">
    <label for="nick">Username</label>
    <input type="text" name="nick" id="nick" maxlength="20" required>
    <br>

    <label for="new_password">Password</label>
    <input type="password" name="new_password" id="new_password" maxlength="40" required>
    <br>

    <label for="first">First</label>
    <input type="text" name="first" id="first" maxlength="40" required>
    <br>

    <label for="last">Last</label>
    <input type="text" name="last" id="last" maxlength="40" required>
    <br>

    <label for="is_admin">Is Admin</label>
    <input type="checkbox" name="is_admin" id="is_admin">
    <br>

    <!-- maybe later -->
    <!-- <input type="hidden" name="_csrf" value="csrf_token" -->
    <input type="submit" value="Save">
</form>

<?php include dirname(path: __DIR__) . '/_footer.html.php' ?>