List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-rules&page=5638
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "Inscrivez-vous on fera beaucoup de tournoi?",
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            "description": "Hi everyone, welcome and have FUN!\n\nDouble elimination tournament every Sunday.",
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            "description": "Can you endure? 12 games ,months of playtime",
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