List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclusivity&page=451
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "新企画 月例13路盤大会です。\nご都合に合わせて、気楽にご参加下さい。\nコロナに負けず、楽しみましょう。",
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