List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=675
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "Viendo que hoy no nos podemos reunir, jugamos torneo. He pensado que además de los martes que no podamos juntarnos podemos añadir otro día más para jugar online",
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