List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-time_per_move&page=25
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=-time_per_move&page=24",
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                "name": "Go Cookies!",
                "summary": "The Go branch of the Cookies club. Other branches include Chess Cookies!",
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            "description": "I’ve just started a quick competition whilst people are still joining the group, enjoy!",
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