List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-subsequent_pairing_method&page=66
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Hello.\n\nThis tournament begins this Sunday August 31st at  17:00 GMT (19:00 french hour).\n\nI will maybe do others tournaments, but with original rules :)",
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