pub_sub_sample.js

const {PubSub} = require('@google-cloud/pubsub');

async function listenForMessages() {
  const pubsub = new PubSub();
  const subscriptionName = 'elevar-event-subscription';
	const subscription = pubsub.subscription(subscriptionName);

  const messageHandler = (message) => {
    // Handle event 
    message.ack();
  };

  subscription.on('message', messageHandler);
}

listenForMessages();