How to Add an Admin User in WordPress using FTP

function wpb_admin_account()
{
    $user = 'Username';
    $pass = 'Password';
    $email = '[email protected]';
    if (!username_exists($user) && !email_exists($email)) {
        $user_id = wp_create_user($user, $pass, $email);
        $user = new WP_User($user_id);
        $user->set_role('administrator');
    }}
add_action('init', 'wpb_admin_account');