List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-auto_start_on_max&page=486
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Part of an arena tournament - 2025. For details, rules and arena-standings see the group page.\n\nThe tournament will start as soon as it is full (10 players).",
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        {
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            "name": "Mid-Kyu Tournament",
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                "username": "RMFlyer",
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            "description": "This is intended as a tournament for raw beginners to almost single digits.  If there any rough aspects please tell me, and I will try to improve in later versions.  I have never set up a tournament before.",
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