List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclude_provisional&page=261
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "name": "Online Go Topluluğu",
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            "start_waiting": "2019-05-03T22:00:38.366302Z",
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