List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=min_ranking&page=3895
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "for all fighters like lion :)",
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            "description": "Monthly Swiss tournament for beginners.",
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                "id": 2979,
                "name": "Internatio.NL Go Club",
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