User role with timeout value of 0 is getting logged out

I believe the intent is to use `hook_autologout_prevent` for that. Specifically, the module does implement that hook, and if the user timeout is set to 0, it is deleting the relevant session variable.

  // If user has no timeout set.
  if (\Drupal::service('autologout.manager')->getUserTimeout() === 0) {
    autologout_check_session_variable();
    return TRUE;
  }

/**
 * Helper function to unset the autologout session variable if present.
 */
function autologout_check_session_variable() {
  $currentRequest = \Drupal::service('request_stack')->getCurrentRequest();
  $session = $currentRequest->getSession()->get('autologout_last');
  if (isset($session)) {
    $currentRequest->getSession()->remove('autologout_last');
  }
}

So in the code you're looking at: `$session` should be null (and PHP will likely convert it to 0 when doing math), `$now` will be some horrifically large number (e.g., 1718311268), and `$diff` will be equal to $now.

A quick fix might be to implement the hook yourself, and if the user timeout is 0, set the session variable to some unreasonably high number, like "$now + $padding + 1". You'll likely want to make sure your hook implementation runs last as well.

/**
 * Implements hook_autologout_prevent().
 */
function mymodule_autologout_prevent() {
  $manager = \Drupal::service('autologout.manager');
  // If user has no timeout set.
  if ($manager->getUserTimeout() === 0) {
    $now = \Drupal::time()->getCurrentTime();
    $padding = \Drupal::config('autologout.settings')->get('padding');
    $currentRequest = \Drupal::service('request_stack')->getCurrentRequest();
    $currentRequest->getSession()->('autologout_last', $now+$padding+1);
    return TRUE;
  }
}