List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=1915
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "A 9x9 tournament for lower grades. Enjoy everybody.",
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            "description": "Last tournament was a disaster, so we hold this to make things right again!",
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