List all tournaments or create a new tournament.

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HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "exclude_provisional": true,
            "group": {
                "id": 13655,
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                "summary": "Organising arena-type handicap correspondence tournaments.",
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                "is_public": true,
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            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2024-05-30T14:42:18.917887Z",
            "ended": "2024-10-15T14:48:50.520186Z",
            "start_waiting": "2024-05-30T14:42:18.310980Z",
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            "icon": "https://user-uploads.online-go.com/5fe2ed1a16feb631d49732f2de506b9e-15.png",
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    ]
}