List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclude_provisional&page=5887
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "ended": "2024-05-24T19:32:32.422724Z",
            "start_waiting": "2024-05-24T18:00:52.363425Z",
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