add user

/**
 * Adds the default roles for all sites to a user, specified by $user_id
 */
function msum_add_roles( $user_id ){

    global $woocommerce;

    foreach( msum_get_blog_list( 0, 'all' ) as $key => $blog ) {

        if( is_user_member_of_blog( $user_id, $blog[ 'blog_id' ] ) )
            continue;

        switch_to_blog( $blog[ 'blog_id' ] );

        $role = get_option( 'msum_default_user_role', 'none' ); // if no default set, use 'none'

        if( $role != 'none' )
            add_user_to_blog( $blog[ 'blog_id' ], $user_id, $role );

        restore_current_blog();
    }
    update_user_meta( $user_id, 'msum_has_caps', 'true' );
}
//add_action( 'wpmu_activate_user', 'msum_add_roles', 10, 1 );
//add_action( 'wpmu_new_user', 'msum_add_roles', 10, 1 );
//add_action( 'user_register', 'msum_add_roles', 10, 1 );
add_action( 'woocommerce_order_status_completed', 'msum_add_roles', 10, 1);