Add New Menu to Account Nav

/* Add New Menu to Account Nav */
function add_menu_account_nav( $endpoint ) {
    $item = array(
        'custom_menu' => array(
            'slug'  => 'author/' . wp_get_current_user()->user_login,
            'label' => 'custom_menu',
            'title' => esc_html__( 'Custom Menu', 'jnews' )
        )
    );
    $endpoint = array_merge( $endpoint, $item );
    return $endpoint;
}
add_filter( 'jnews_account_page_endpoint', 'add_menu_account_nav' );