List all tournaments or create a new tournament.

GET /api/v1/tournaments/?ordering=-players_start&page=5716
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "ended": "2022-11-07T20:26:33.427511Z",
            "start_waiting": "2022-10-08T11:00:46.519746Z",
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}