List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=first_pairing_method&page=729
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "group": {
                "id": 4456,
                "name": "Our Go House",
                "summary": "Hello this is Our Go House ๐Ÿ”ฐ๐Ÿ”ฐ\n๐Ÿ˜ƒ๐Ÿ™ƒ๐Ÿ˜Š๐Ÿ‘‹ YEET",
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                "username": "แƒ“แƒแƒ—แƒ",
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