List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=275
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Only 15 to 10 kyu :)\nLets hope, that someone of us get an SDK rank ^^",
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        {
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            "name": "19-10k February 13 tournament",
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