List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=18
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=17",
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            "description": "можно книжки,\nнельзя ИИ,\nАйФоны не разыгрываются.",
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                "id": 1943,
                "name": "Супутник - київський клуб ґо / Suputnyk Kyiv Go Club",
                "summary": "Навчання та спілкування!\nВідкриті для дітей та дорослих. Всі, хто цікавиться ґо - приходьте.",
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            "description": "Go join this tournament!",
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