List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-subsequent_pairing_method&page=5765
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "We are playing for 2 rounds and feel free to challenge other player (by clicking their names u can see the 'challenge' button) after that if u want! \nSee you guys at 5 pm on Friday! :D",
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                "username": "Peter ;)",
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                "name": "TARUMT Weiqi CoQ",
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                "summary": "ต่างสำนัก แต่เป็นเพื่อนกัน กอดคอกัน ขึ้น DAN",
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