List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-id&page=3805
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                    "time_increment": 86400
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                "max_ranking": 36,
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                "base_points": "10.0"
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            "tournament_type": "roundrobin",
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            "id": 54291,
            "name": "The 17th Murase Go Group Tournament",
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            "exclude_provisional": false,
            "group": {
                "id": 2389,
                "name": "Murase Go Group",
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}