Publishing on a Different GCP project

/pubsub/topics/example-topic-with-custom-credentials.ts

export default class ExampleTopic extends Topic {

static readonly topicName = 'example-topic-with-custom-credentials';

static project: GooglePubSubProject = {

id: 'custom-project-id',

credentials: {

// eslint-disable-next-line

client_email: 'client@google-auth.google.com',

// eslint-disable-next-line

private_key: 'private_key_goes_here'

},

};

}