List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=max_ranking&page=555
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=max_ranking&page=554",
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        },
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            "name": "2022/09/24 crazy bot super tournament",
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                "username": "Françisa",
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            "name": "9x9 Mini League 1k-9k #40",
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            "description": "Special league for players between 9kyu and 1kyu. Tournament will be started as soon as 5 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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            "description": "Have fun! More details at https://online-go.com/group/10855",
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            "player_count": 0,
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        },
        {
            "id": 105506,
            "name": "It's a journey. Let's get stronger! #2",
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                "id": 1186160,
                "username": "hanzpk",
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            "description": "Gather your strength then lash out!",
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