function auto_login_site_b_shortcode() {

    if( ! function_exists( 'wp_fusion' ) ) {
        return false;
    }

    $contact_id = wp_fusion()->user->get_contact_id();

    if( ! empty( $contact_id ) ) {

        return '<a href="https://amethyst.practitionerplatform.site/vu/?cid=' . $contact_id . '">Click Here</a>';

    }

}

add_shortcode( 'auto_login_site_b', 'auto_login_site_b_shortcode' );