First, make sure your Google Analytics code has been added to VYPER. This document helps you with that.
There's a few ways to make sure you can see source / medium.
1 - You have to set-up cross-domain tracking (tracking either VYPER's domain or your subdomain) to track medium and source, otherwise, GA reports it as a referral.
Here's a help doc for you:
2 - Set up VYPER as an exclusion URL.
3 - View a secondary dimension (gif below shows you how to do it).
- You can see source / medium referral traffic without setting up cross-domain, see documentation.
- If still want to set up cross-domain tracking, we recommend doing it using Google Tag Manager.