List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-handicap&page=5657
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "An open group for folks' who like OGS!",
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                "is_public": true,
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            "subsequent_pairing_method": "strength",
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            "analysis_enabled": false,
            "exclusivity": "open",
            "started": "2013-03-28T03:39:39.354223Z",
            "ended": "2013-05-01T17:04:33.137009Z",
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}