Menu special for logged in users

Hi,

i would like to insert a menu with avatar and message for logged in users in the menu area.
I want that the menu can be then, personalized in the default wordpress menu area.
For that, i have entered this code in functions child theme:

if ( is_user_logged_in() ) {
    $current_user = wp_get_current_user();
    if ( ($current_user instanceof WP_User) ) {
        echo 'Welcome : ' . esc_html( $current_user->display_name );
        echo get_avatar( $current_user->ID, 32 );
    }
}

But now, i want display it on the menu.
How can i do this?

Regads,

Alexis