List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-players_start&page=5818
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "exclusivity": "open",
            "started": "2023-11-20T06:00:52.441548Z",
            "ended": "2024-02-12T00:42:08.301789Z",
            "start_waiting": "2023-11-20T06:00:52.312689Z",
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