[Paal Joachim Romdahl]

I added a link to a private forum in the menu so that a logged in user could easily access the forum. Yes I could add a menu for logged in users, but I decided to instead redirect the not logged in users.

Here is the code I used:

// Redirect private bbPress forum to specific page.
add_action('template_redirect', 'private_content_redirect_to_login', 9);
function private_content_redirect_to_login() {
  global $wp_query,$wpdb;
  if (is_404()) {
    $host = $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
    $path = dirname($_SERVER['REQUEST_URI']);
    $forums = "forum";
    $location = "https://direitoshumanosangola.org/not-logged-in/";
    }
    if(strpos( $path, $forums ) !== false){
      wp_safe_redirect($location);
      exit;
  }
}

I made a tutorial for it here:
https://www.easywebdesigntutorials.com/hide-buddypress-pages-and-bbpress-forums-from-not-logged-in-users/