Nifi not writing to GCP Pub/Sub

Question

I am trying to send sample text messages to GCP Pub/Sub topic "ABC" using Nifi (PublishGCPubSub). However, I do not see any of those messages in cloud shell.

There is no issue in the topics as when I send sample message from cloud shell itself to the topic, I am able to read the same from the subscription in cloud shell.

Below is my nifi flow:

Answer 1

This was resolved by the author:

I solved my problem. The issue was with the service account which was not setup for pub-sub. I used the correct service account json key and the issue has been resolved.