List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-players_start&page=545
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=544",
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                "id": 2946,
                "name": "Final Frontier",
                "summary": "Welcome to Final Frontier.\n\nWe have tons of tournaments and a magnificent director-Picard.\nPlease join this frontier soon, we are closing!",
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            "description": "Open league for everyone. Tournament will be started as soon as 10 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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            "id": 9182,
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            },
            "description": "Just another tournament...that will be totally awesome",
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                "id": 537,
                "name": "Race to SDK!",
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