List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-players_start&page=5324
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=-players_start&page=5323",
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            "description": "A Go tournament that (should) be rather quick and is starting soon!",
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                "summary": "A Go club for nerdy people.",
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            "description": "月例13路盤対局、11月も開催します。ご都合が付きましたら、気楽にご参加下さい。",
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