PHP 7.4 compability

When I upgraded to WordPress 5.3.2 with PHP 7.4.1 I’m getting this message:

Notice: Trying to access array offset on value of type bool in /var/www/html/public/app/plugins/when-last-login/when-last-login.php on line 257

Row 257 to 263 is:

      $show = $settings['show_all_login_records'];

      if( 1 === $show ) {
        $show = true;
      }else{
        $show = false;
      }

As a quick fix I replaced the above with this:

$show = (!empty($settings['show_all_login_records']) AND $settings['show_all_login_records'] === 1);

But yes, it would be nice if this plugin have full PHP 7.4 comparability.