List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=players_start&page=4482
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "is_open": true,
            "exclude_provisional": true,
            "group": {
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                "name": "9x9 Lovers",
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                "require_invitation": false,
                "is_public": true,
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            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 20,
            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2023-08-05T18:19:01.905780Z",
            "ended": "2023-08-19T11:38:00.509723Z",
            "start_waiting": "2023-08-05T18:19:01.737735Z",
            "board_size": 9,
            "active_round": null,
            "icon": "https://user-uploads.online-go.com/524010f9e013f409bdc23336febde936-15.png",
            "player_count": 5,
            "ranked": true
        }
    ]
}