SITUATION:
I follow this tutorial: https://cloud.google.com/nodejs/tutorials/bookshelf-on-compute-engine
Everything works fine until I do
You have to create an object of your SessionsClient. Here I will provide some steps, so you can run your code like a charm.
const sessionClient = new dialogflow.SessionsClient({
keyFilename: "/var/www/html/moqatrips/dialog-flow.json"
});