List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=min_ranking&page=5891
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments/?format=api&ordering=min_ranking&page=5890",
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            "name": "danono's mini-tournament",
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                "username": "danono",
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            "name": "2010 Kyu MiniTournament",
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            "description": "Основная идея турнира в том что бы игроки во время игры оставляли \"Малковические записи\" о некоторых своих ходах, их не видно во время игры но можно прочитать по ее окончанию. Думаю что всем участникам это будет полезно.\nПросьба, если вам лень делать записи, или вы просто не любите делиться своими мыслями или не владеете Русским языком отказаться от участия в турнире.",
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                "summary": "Интересные, призовые турниры.",
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                "username": "boredom",
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        {
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