First, access your DialogFlow agent.
Click on the "settings" icon on the left
Make sure that your agent is using Dialogflow V2 API
In the settings, click on the link next to "Service Account".
You will arrive on this page, and click "Create" at the top of the page
Fill out the required details below
Add a role to the service account as "Owner"
Click on "Continue"
Click on "Create Key"
A window on the right of your screen will pop up and ask you what key type is needed
Click on "JSON" and "Create"
finally, store the JSON service account somewhere safe.
On h34 interBot Relay, you will need to specify:
Specify a "Device Name".
Paste the JSON service account details you have previously saved.
Enter a unique "Invocation" to allow your bot to be called directly.
Enter "Metatags" (separated by a commas) to categorise your bot.