List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclusivity&page=5609
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "Bonjour à tous, \n\nVoici un premier tournoi pour essayer de jouer ensemble.\n\nJe vous souhaite de bonnes parties à tous.",
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                "name": "Go-Chu",
                "summary": "Un lugar para recrearse",
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