List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=rules&page=16
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "A tournament for attendees of the '24 Congress. Participation is not required.\n\nI'm not sure what these settings will do, but let's see!",
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        {
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