public void SendAdminNotification(StringCollection addedUsernames, StringCollection reactivatedUsernames, StringCollection deactivatedUsernames)
 {
     try {
         Send(adminEmail.CreateMessage(addedUsernames, reactivatedUsernames, deactivatedUsernames));
     } catch (Exception error) {
         logger.Error("Failed to send notification to admin: " + error.Message);
     }
 }