List all tournaments or create a new tournament.

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HTTP 200 OK
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Content-Type: application/json
Vary: Accept

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            "description": "Hello fellow stars riders, a little tourney to keep this community alive and have some fun and fast correspondence games. I'd also like to create a live tournament if some of you are interested. Feel free to PM me or discuss in the chat.\n\nLive long and propser, always in gote.",
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                "summary": "A group of brothers playing each other, but hosting public tournaments as well. Beginner level!",
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            "time_start": "2021-10-04T20:17:00Z",
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            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
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            "analysis_enabled": true,
            "exclusivity": "group",
            "started": "2021-10-04T20:17:07.852545Z",
            "ended": "2021-10-04T20:37:45.902647Z",
            "start_waiting": "2021-10-04T20:17:07.644828Z",
            "board_size": 9,
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}