Hi @GurpreetKaur , one option you might consider is using a Google Pub/Sub Push Subscription . This will cause Google Pub/Sub to invoke a webhook for every message it needs to send. You could point the webhook to the PubSub+ REST incoming interface.
The only problem is that PubSub+ won’t be able to make use of Google’s authentication mechnism to authenticate Pub/Sub, as this is specific to Google Cloud.