Navigate to the domain-profile once logged in via insights.rumvision.com
When going to the dashboard, you'll immediately get prompted with a notification that there is no data yet. The notification will also show a link to a new page, containing your domain's snippet.
These notification can be disabled for the current session. If you aren't being prompted anymore, then collapse the "Settings" option and go to "Snippet".
Once seeing your snippet, you can copy it in two ways:
automatically by clicking "Copy" at the top right;
or manually by selecting the contents and then copying it.