List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-max_ranking&page=5386
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "hi im beginner this is a simple beginners tournament",
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            "subsequent_pairing_method": "slaughter",
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            "exclusivity": "open",
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            "start_waiting": "2020-02-16T19:19:29.259048Z",
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}