List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=691
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "You want to become World Champion or a Continental champion? Join us :)",
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            "subsequent_pairing_method": "random",
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            "started": "2020-06-01T12:20:32.962930Z",
            "ended": "2021-04-14T23:59:09.838003Z",
            "start_waiting": "2020-06-01T12:20:32.014927Z",
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}