List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=time_per_move&page=4035
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "name": "Nantes Yosakura",
                "summary": "Groupe OGS du club Nantes Yosakura.",
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            "description": "For those of us trying to move from DDK to SDK.\nPlease note you must average at least 4 plays per day.",
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                "username": "siimphh",
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                "name": "Группа для создания Турниров!!!",
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            "description": "Welcome to the group stage!",
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