List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-players_start&page=465
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "Tournaments for people who like to play quick correspondence games.",
                "require_invitation": false,
                "is_public": true,
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            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
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            "analysis_enabled": true,
            "exclusivity": "open",
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            "ended": "2019-03-09T21:16:13.196907Z",
            "start_waiting": "2019-02-06T23:20:49.916187Z",
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}