code: def unban_user(self, room_id, user_id):
          
          body = {
              "user_id": user_id
          }
          return self._send("POST", "/rooms/" + room_id + "/unban", body)
docs: Perform POST /rooms/$room_id/unban
  
          Args:
              room_id (str): The room ID
              user_id (str): The user ID of the banee(sic)