List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclude_provisional&page=394
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "The home for all of the old OGS mini tournaments",
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            "analysis_enabled": false,
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            "started": "2011-02-20T21:46:16Z",
            "ended": "2011-02-20T20:46:16Z",
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}