List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-first_pairing_method&page=464
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Join the group for more cat tournaments ^__^",
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            "description": "Itโ€™s Christmas \n~~",
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            "description": "To beat Akira...",
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