List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=4398
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "黃暐升\t許澤延",
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                "name": "Go friends 🐬",
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            "subsequent_pairing_method": "slaughter",
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            "exclusivity": "open",
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