List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclusivity&page=425
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=exclusivity&page=424",
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            "description": "大会を開いてほしいとリクエストをいただいたので、少々急ですが第4回珊瑚杯を開催します!第3回と同様にハンデ戦です。今回は時間制限を「単純持ち時間式」としてみます。対戦相手と協力して時間内に打ち終えるようにしてみてください。総当たり戦としますので、参加人数によっては少し忙しいかもしれません。",
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