For the given event build ARN and return the configured function

def get_function_from_bot_intent_trigger(self, event):
        """
        For the given event build ARN and return the configured function
        """
        intent = event.get('currentIntent')
        if intent:
            intent = intent.get('name')
            if intent:
                return self.settings.AWS_BOT_EVENT_MAPPING.get(
                    "{}:{}".format(intent, event.get('invocationSource'))
                )