How to set up a 2v2 tournament in Carde.io?

Ruling: Carde.io does not have native 2v2 support. Use the multiplayer unpaired option with external pairing via swisssystem.org, or set up a swiss tournament with only one person from each team signing up.

Sequence:

• Set up multiplayer unpaired in Carde.io OR set up a swiss tournament
• If using multiplayer unpaired: use swisssystem.org for team pairing
• If using swiss: have only one person from each team sign up

Nuances:

• The original asker chose the swiss tournament method with one person per team signing up