List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-min_ranking&page=78
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Another tournament for fun.",
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                "summary": "Tournaments for people who like to play quick correspondence games.",
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                "summary": "A group for Go players who love the 9x9 board.",
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