GCP Cloud Run Service Getting '401 Unauthorized' scenarios When Accessing Pub/Sub Subscription
I'm working on a personal project and I'm writing unit tests and I'm working with an scenario where my Cloud Run service continuously returns a '401 Unauthorized' behavior when trying to access a Pub/Sub subscription... I'm using the Google Cloud Client Library for Node.js (version 6.4.0). The service account associated with the Cloud Run service has the 'Pub/Sub Subscriber' role, but it seems the authentication fails when I attempt to pull messages from the subscription. Here’s a snippet of the code I'm using to pull messages: ```javascript const { PubSub } = require('@google-cloud/pubsub'); const pubSubClient = new PubSub(); async function pullMessages(subscriptionName) { const subscription = pubSubClient.subscription(subscriptionName); const [messages] = await subscription.pull(); messages.forEach(message => { console.log(`Message received: ${message.data.toString()}`); // Acknowledge the message message.ack(); }); } pullMessages('my-subscription'); ``` I've ensured that the environment variable `GOOGLE_APPLICATION_CREDENTIALS` is set correctly to point to the service account key file. I also verified that the Cloud Run service is running in the same project as the Pub/Sub service. However, when I check the logs, I consistently see this entry: ``` behavior: 401 Unauthorized ``` To troubleshoot, I checked the IAM permissions and confirmed that the service account has the necessary permissions. I also tried deploying the service with different configurations, but the scenario continues. Is there something I'm missing in the authentication process or any additional steps required when accessing Pub/Sub from Cloud Run? Any guidance would be appreciated. I'm working on a application that needs to handle this. How would you solve this? Has anyone else encountered this? I'd really appreciate any guidance on this.