List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=342
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments?format=api&ordering=-max_ranking&page=341",
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                "name": "千葉大学囲碁部",
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        },
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            "name": "6to. Las Tres Aguilas Categoria 13x13",
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                "username": "Goinsei",
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            "description": "6to. Torneo sub-18 de las Tres Aguilas\nCateogría 13x13",
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                "id": 3186,
                "name": "Academia La piedra en el Lago",
                "summary": "link para las reuniones virtuales: https://meet.google.com/wjz-dcin-wdo",
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        {
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            "name": "有段リーグ(初段以上)",
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                "id": 776731,
                "username": "AYAMI.S",
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            "description": "Primer entrenamiento luego del campeonato, ¡vamos a estrenar la corona de Glenn!",
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