List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclude_provisional&page=101
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2023-03-28T16:00:07.922891Z",
            "ended": "2023-07-11T19:32:45.811897Z",
            "start_waiting": "2023-03-28T16:00:07.677758Z",
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}