code: def check_new_messages(client_id):
      
      # Return if driver is not defined or if whatsapp is not logged in.
      # Stop the timer as well
      if client_id not in drivers or not drivers[client_id] or not drivers[client_id].is_logged_in():
          timers[client_id].stop()
          return
  
      # Acquire a lock on thread
      if not acquire_semaphore(client_id, True):
          return
  
      try:
          # Get all unread messages
          res = drivers[client_id].get_unread()
          # Mark all of them as seen
          for message_group in res:
              message_group.chat.send_seen()
          # Release thread lock
          release_semaphore(client_id)
          # If we have new messages, do something with it
          if res:
              print(res)
      except:
          pass
      finally:
          # Release lock anyway, safekeeping
          release_semaphore(client_id)
docs: Check for new unread messages and send them to the custom api
  
      @param client_id: ID of client user