code: def get_slot_value(handler_input, slot_name):
      # type: (HandlerInput, str) -> AnyStr
      
      slot = get_slot(handler_input=handler_input, slot_name=slot_name)
  
      if slot is not None:
          return slot.value
  
      raise ValueError(
          "Provided slot {} doesn't exist in the input request".format(
              slot_name))
docs: Return the slot value from intent request.
  
      The method retrieves the slot value from the input intent request
      for the given ``slot_name``. More information on the slots can be
      found here :
      https://developer.amazon.com/docs/custom-skills/request-types-reference.html#slot-object
  
      If there is no such slot, then a :py:class:`ValueError` is raised.
      If the input request is not an
      :py:class:`ask_sdk_model.intent_request.IntentRequest`, a
      :py:class:`TypeError` is raised.
  
      :param handler_input: The handler input instance that is generally
          passed in the sdk's request and exception components
      :type handler_input: ask_sdk_core.handler_input.HandlerInput
      :param slot_name: Name of the slot for which the value has to be retrieved
      :type slot_name: str
      :return: Slot value for the provided slot if it exists
      :rtype: str
      :raises: TypeError if the input is not an IntentRequest. ValueError is
          slot doesn't exist