List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=2119
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "require_invitation": false,
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                "id": 1015644,
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                "id": 3524,
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            "auto_start_on_max": true,
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            "subsequent_pairing_method": "random",
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                "id": 797566,
                "username": "Averyyuen",
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                "icon": "https://user-uploads.online-go.com/35eb3fcb6b2e8a3a87065cbc4c3a73f2-64.png",
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                "require_invitation": false,
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            "exclusivity": "group",
            "started": "2020-07-26T16:50:33.872430Z",
            "ended": "2020-07-26T16:54:57.256502Z",
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}