List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=rules&page=35
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "analysis_enabled": false,
            "exclusivity": "open",
            "started": "2017-12-09T17:31:14.631523Z",
            "ended": "2017-12-09T17:48:28.293594Z",
            "start_waiting": "2017-12-09T17:31:11.636420Z",
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