List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclusivity&page=5710
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "アタリガールさん、carteriさん、gakkunさん、tomi-nchi-goさん、rs3001さん、JethOrensinさん",
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                "name": "かおり杯-World Kaori Cup-",
                "summary": "For every player who enjoy go game",
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