List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=rules&page=14
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Que le meilleur gagne !",
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            "description": "...first online club tournament!!!",
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                "name": "Stony Brook Go Club",
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                "username": "天鵝國公主",
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