List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=5333
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "I can’t think about a name",
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            "description": "Have fun there!",
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                "summary": "Hey!Please join this group.You can practice there.There is a lot of tournament(19x19,13x13 and 9x9) there too!You can learn something there.You will be stronger after joining this group.",
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