List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=players_start&page=11
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "A minha primeira tentativa de criar um torneio… ainda não conheço bem as opções, mas espero que não esteja muito mal.",
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