List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclude_provisional&page=5544
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=-exclude_provisional&page=5543",
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        {
            "id": 57721,
            "name": "COVID-19 SWISS Tournament",
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                "id": 89030,
                "username": "vitamancy",
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            "description": "Let's try this again.",
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                "id": 651,
                "name": "Walla Walla Go Club",
                "summary": "A online club for Walla Walla Go Club members!",
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            "name": "无间勤碁术化 友谊赛",
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                "username": "Grandpa Arrow A6",
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            "description": "Happy X'mas Happy Go",
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            "group": {
                "id": 13797,
                "name": " 无间勤碁术化  Go Advance forward forever",
                "summary": "欢迎围棋爱好者来到属于您的园地\n\n\n          In Your 💖 Go to Universes everywhere",
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                "username": "FUKO.S",
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