List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=board_size&page=3655
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=board_size&page=3654",
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            "name": "The 9th Murase Go Group Tournament",
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            "description": "毎月27日に開催される定例トーナメントです。これは第九回村瀬碁グループ定例トーナメントです。2019年5月27日に開始されます。\n\nA tournament that happens every month on 27th. This is the 9th tournament starts on May 27th, 2019.",
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