List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-max_ranking&page=90
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "summary": "You want to become World Champion or a Continental champion? Join us :)",
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            "subsequent_pairing_method": "random",
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            "exclusivity": "open",
            "started": "2020-06-22T14:13:40.768237Z",
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            "start_waiting": "2020-06-22T14:13:39.429854Z",
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}