List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-id&page=12
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "username": "Braintured Boomerang",
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            "description": "Greetings all, this is a 9x9 tournament. Anyone can join this tournament! If you already know the details, you can skip the next paragraph.\n\nStart time: 1st of March, 2026, 6PM. Time per Move: 28 days. No pausing on weekends. The tournament type is Single Elimination, the Initial Pairing Method is Random, and so is the Subsequent Pairing Method. Rules: Japanese, no handicap. Provisional players are allowed. No excluding people! 😜\n\nPlease feel free to join this tournament and invite others too! (I actually want at least 5 people. Invite everyone now!)\n\nThanks for reading this (and maybe joining it)!\n\nBrainture,\nBoomerangos",
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            "name": "Just a random tournament - Come and join if you'd like to",
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                "id": 1926370,
                "username": "kylerwee02",
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            "description": "Just a random tournament. Provisional players are invited (because I am one). Hope you don't mind! Come and join if you'd like to! This is a 9x9 tournament. Have fun! ~Anonymous Guy (if u know who i am i am a random guy that u prob dont know) 😜",
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                "summary": "This is just a group. Do whatever you like here! It is also alright if you want to just join this group and chat. ~Destroyer802 😝",
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            "name": "Saturday Afternoon Live 19x19 #01",
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            "description": "If you want to join a live tournament, this is for you.",
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            "description": "Double-Elimination tournament for everyone. It will be started as soon as 8 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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                "name": "9x9 Lovers",
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        {
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