List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=subsequent_pairing_method&page=350
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "A group for Go players who love the 9x9 board.",
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            "time_start": "2025-09-21T19:00:00Z",
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            "first_pairing_method": "random",
            "subsequent_pairing_method": "random",
            "min_ranking": 5,
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            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2025-09-19T14:13:20.079635Z",
            "ended": "2026-04-22T16:08:48.363626Z",
            "start_waiting": "2025-09-19T14:13:19.965196Z",
            "board_size": 9,
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    ]
}