List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=players_start&page=354
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Let's have fun",
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            "description": "14th happy tourney, I will create a new tournament with this name every Monday, have fun!",
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        {
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            "description": "This isa super fast tournament!",
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                "id": 5925,
                "name": "Group for GO",
                "summary": "Don't have a group? No problem, just join this group!",
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            "description": "9x9 like Shogi, the only major chess variant where you can put pieces back on the board.",
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