List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-description&page=1339
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "exclusivity": "open",
            "started": "2017-11-11T08:01:20.466022Z",
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            "start_waiting": "2017-11-11T08:01:18.727494Z",
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}