Hiding Nav Menus from Logged Out Users

Hey,

I’ve been trying to modify my theme to display different menus to users logged in. I’ve created two menus in wordpress called logged-in and logged-out and was trying to apply a condition to display the correct menu. I’ve tried various plug-ins, which do change the menus but they don’t seem to be detecting if a user is logged in or not.

I’ve added the following code to functions.php.

if( is_user_logged_in() ) {
	$args['menu'] = 'logged-in';
} else {
	$args['menu'] = 'logged-out';
}
	return $args;
}
add_filter( 'wp_nav_menu_args', 'my_wp_nav_menu_args' );

And found references to nav menus in the following locations.

Functions.php

register_nav_menus( array(
        'primary'   => __( 'Primary menu', 'magnis' ),
        'secondary' => __( 'Footer menu','magnis' ),
    ) );

Header.php

<!-- site desktop menu start //-->
	            <nav class="site-desktop-menu">
	            	<?php
					 $primarymenu = array(

							'theme_location'  => 'primary',

							'menu'            => '',

							'container'       => '',

							'container_class' => '',

							'container_id'    => '',

							'menu_class'      => '',

							'menu_id'         => '',

							'echo'            => true,

							'fallback_cb'     => 'wp_page_menu',

							'before'          => '',

							'after'           => '',

							'link_before'     => '',

							'link_after'      => '',

							'items_wrap'      => '<ul>%3$s</ul>',

							'depth'           => 0,

							'walker'          => ''

						);

						if ( has_nav_menu( 'primary' ) ) {

							wp_nav_menu( $primarymenu );

						}

					?>

				</nav>

Any ideas how to update them properly. Thanks for your help.

D