Allow /register to be accessed when using forcelogin plugin.

my_forcelogin_bypass.php

<?php

  /**
   * Bypass Force Login to allow for exceptions. Used to push everyone to the login page, except if they are registering.
   * As it stands, this code allows the forcelogin plugin to ignores /register.
   *
   * @param bool $bypass Whether to disable Force Login. Default false.
   * @param string $visited_url The visited URL.
   * @return bool
   */
  function my_forcelogin_bypass( $bypass, $visited_url ) {
      // Allow all single posts
      if ( is_single() ) {
        $bypass = true;
      }
    
      // Allow these absolute URLs
      $allowed = array(
        home_url( '/register/' )
      );
      if ( ! $bypass ) {
        $bypass = in_array( $visited_url, $allowed );
      }
    
      return $bypass;
    }
    add_filter( 'v_forcelogin_bypass', 'my_forcelogin_bypass', 10, 2 );