List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=name&page=5307
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Another tournament, I forgot to set restrictions on ranks for the first one.",
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            "description": "Have fun in this tournament!😀",
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            "description": "Enjoy !",
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