List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=players_start&page=4618
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2022-04-29T10:45:22.069403Z",
            "ended": "2022-05-29T01:18:23.896135Z",
            "start_waiting": "2022-04-29T10:45:21.926746Z",
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}