List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=rules&page=23
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2021-04-02T00:20:51.317619Z",
            "ended": "2021-04-02T00:22:34.053617Z",
            "start_waiting": "2021-04-02T00:20:51.203540Z",
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        }
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}