List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-rules&page=5917
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "next": null,
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                "name": "SA Go Camp 2021",
                "summary": "Saint Ann's Go Camp 2021!",
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