List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=93
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "this tournament is created in the new year, happy new year to all",
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                "summary": "한국인 대환영. 한국인과 글로벌 유저들을 위한 모임, We are connected all together.",
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            "name": "vp's mini-tournament SDK 13",
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                "admin_only_tournaments": false,
                "hide_details": false,
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                "username": "花林渡",
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                "name": "Single Digit Kyu Room",
                "summary": "A room for SDK's \r\n",
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