List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-min_ranking&page=455
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "OGSだと適正な手合でトーナメントは難しいのでとりあえずオール互戦で総当たりにします。 そこから適当に点数決めて出来たらいいな… という訳で段位者とも互戦で打てるチャンスかもね! 最大6人です。 持ち時間は少し短く一手1日最大2日にします。 参加出来るかたよろしくね!\n既に順位戦に参加してるかたは無しでお願いします!",
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            "description": "vamos a jugar go",
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