List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=subsequent_pairing_method&page=1180
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "analysis_enabled": true,
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            "ended": "2020-04-05T18:56:52.123024Z",
            "start_waiting": "2020-04-05T18:30:10.781762Z",
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