List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-players_start&page=5858
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=-players_start&page=5857",
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            "description": "Fish inadvertently",
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                "name": "Susquenita Go Club",
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            "name": "19x19​ tournament...",
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            "description": "9x9 like Shogi, the only major chess variant where you can put pieces back on the board.",
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                "summary": "Group for Shogi players on 81Dojo",
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