List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=min_ranking&page=5805
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Another small tournament! Do your best, good luck and have fun!",
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                "name": "reddit",
                "summary": "/r/baduk",
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