List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-subsequent_pairing_method&page=161
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "The last one was kinda set up in minutes on accident. I'm kinda new to the whole thing here so...yeah, basically same idea as before. You get to play everyone in the group. It's not about ranking or anything more than good fun and learning so chat with your opponent, most of us in here are talkers anyway and the better ones have no problem giving tips and pointers (that's why I picked them for this group). Sorry about the first one!",
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                "summary": "HOW DO YOU DELETE A GROUP YOU STARTED?",
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