_hide_wpcodebox.md

Hide WPCodebox menu item and page from other users.

Make it availble to all admins with email of @agencyemail or by username

hide_wpcodebox.php

add_action("admin_init", "disable_access_to_wpcodebox");
function disable_access_to_wpcodebox()
{
    if (is_user_logged_in()) {
        $current_user = wp_get_current_user();
        $username = $current_user->user_login;
        if (
            strpos($current_user->user_email, "@agencyemail") === false &&
            !in_array($username, ["Usernameexample1", "Usernameexample2"])
        ) {
            remove_menu_page("wpcodebox2");
            if (isset($_GET["page"]) && $_GET["page"] === "wpcodebox2") {
                wp_die("You do not have permission to access this page.");
            }
        }
    }
}