List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-board_size&page=293
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "### Enjoy one of the new tournament types: Double Elimination! :)",
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            "exclusivity": "open",
            "started": "2013-12-28T00:41:51.200361Z",
            "ended": "2014-08-27T06:10:23.400635Z",
            "start_waiting": "2013-12-28T00:41:50.062894Z",
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}