/**
  * Display SendGrid statistics page
  *
  * @return void
  */
 public static function show_statistics_page()
 {
     $api_key = Sendgrid_Tools::get_api_key();
     if ("apikey" == Sendgrid_Tools::get_auth_method() and isset($api_key) and !Sendgrid_Tools::check_api_key_stats($api_key)) {
         $message = 'Your Api key is not having statistics permissions';
         $status = 'error';
     }
     require plugin_dir_path(__FILE__) . '../view/sendgrid_stats.php';
 }