List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=exclude_provisional&page=336
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "summary": "这里是Leela Zero的中文群组,让我们携手创建围棋之神!",
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