List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=description&page=5274
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "Tournaments for people who like to play quick correspondence games.",
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            "subsequent_pairing_method": "slaughter",
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            "exclusivity": "open",
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            "ended": "2020-07-16T12:38:42.416913Z",
            "start_waiting": "2020-06-03T14:00:34.620363Z",
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}