List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-subsequent_pairing_method&page=4934
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=-subsequent_pairing_method&page=4933",
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            "description": "Special league for players between 25kyu and 10kyu. 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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            "id": 100894,
            "name": "Spring Tourney",
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                "username": "theTick",
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            "description": "Testing out the club tournament feature.  No prizes, only bragging rights.",
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                "name": "North Puget Sound Go Club",
                "summary": "Virtual clubhouse.\n\nWe also meet in person, find details at our main website https://baduk.club/club/npsgo",
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            "id": 57382,
            "name": "Beginners Tournament",
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                "id": 724227,
                "username": "randyb",
                "country": "un",
                "icon": "https://secure.gravatar.com/avatar/5c7bd8c317adf27c4b5bcfe448ffc722?s=64&d=retro",
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            "description": "Beginner Tournament",
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            "title": null,
            "tournament_type": "roundrobin",
            "handicap": 0,
            "rules": "japanese",
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            "time_control_parameters": {
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                "id": 24,
                "name": "Double Digit Kyu Room",
                "summary": "For those of us working our way through to SDK. Whether its for your first time up the ladder and the 20th, lets find some opponents and camaraderie. ",
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                "admin_only_tournaments": false,
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                "icon": "https://cdn.online-go.com/5.1/img/default-group-v5.svg"
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            "time_start": "2020-03-14T02:00:00Z",
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        },
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            "name": "初心者リーグ(~15級まで)",
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                "username": "FUKO.S",
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