List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-auto_start_on_max&page=5
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "username": "Chioxini",
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            "description": "Solo para pasar un buen rato",
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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/12599",
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                "name": "GO Special Tournaments",
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            "name": "The semi-teaching Malkovich tournament",
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                "username": "Lys",
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                "username": "dexonsmith",
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            "name": "9x9 Mini League 5k-15k #117",
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                "username": "wiadp1",
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                "summary": "A group for Go players who love the 9x9 board.",
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        {
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