Add checkbox to WooCommerce login

gistfile1.txt

<?php
add_action( 'woocommerce_register_form', 'custom_add_registration_privacy_policy', 11 );

function custom_add_registration_privacy_policy() {

    woocommerce_form_field( 'privacy_policy_reg', array(
        'class'       => array('form-row privacy'),
        'input_class' => array('woocommerce-form__input woocommerce-form__input-checkbox input-checkbox'),
        'label_class' => array('woocommerce-form__label woocommerce-form__label-for-checkbox checkbox'),
        'label'       => 'I\'ve read and accept the Privacy Policy',
        'required'    => true,
        'type'        => 'checkbox',
    ));

}

// Show error if user does not tick
add_filter( 'woocommerce_registration_errors', 'custom_validate_privacy_registration', 10, 3 );

function custom_validate_privacy_registration( $errors, $username, $email ) {
    if ( ! is_checkout() ) {
        if ( ! (int) isset( $_POST['privacy_policy_reg'] ) ) {
            $errors->add( 'privacy_policy_reg_error', __( 'Privacy Policy consent is required!', 'woocommerce' ) );
        }
    }
    return $errors;
}