List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=max_ranking&page=394
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "name": "COIN Centro de Inteligencias",
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            "description": "Random Tournament for everyone ! :)",
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            "description": "Welcome to join the tournament to have a lot of correspondence games. Pairing is according to strength.",
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