List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=750
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments?format=api&ordering=-max_ranking&page=749",
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            "description": "It's the start of a new academic year. Sounds to me like a good excuse for a Go tournament! The tournament will start 30 minutes after the first club session after Freshers Fair so new members have time to join. If the tournament gets full, I will make another.",
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            "description": "Con todo esta noche , en el tablero de Go.",
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            "description": "…….Noob Fans join pls",
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