List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclude_provisional&page=5097
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "A group for Go players who love the 9x9 board to 19x19 board and an open group for any go players......and members over 150!",
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            "analysis_enabled": true,
            "exclusivity": "group",
            "started": "2020-09-02T02:27:56.026065Z",
            "ended": "2020-10-27T04:51:37.213525Z",
            "start_waiting": "2020-09-02T02:27:55.728285Z",
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}