List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=747
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=-min_ranking&page=746",
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            "name": "Bad tournament 1# do not enter",
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            "description": "Everyone is welcome",
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            "description": "очень крутой турнир",
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        {
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                "username": "sbstnmntlf",
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            "description": "hola 2",
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                "name": "British School Punta Arenas",
                "summary": "Grupo que reúne a los alumnos del Taller de Go del British School - Punta Arenas\n",
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                "username": "Hayden Tam",
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            "description": "UK people can join this game.",
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            "description": "Double-Elimination tournament for everyone. It will be started as soon as 8 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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                "summary": "A group for Go players who love the 9x9 board.",
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        {
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            "description": "Let's have a tournament!",
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