List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=555
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "username": "satoshi84",
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        },
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            "id": 130276,
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                "username": "AlBrickHead",
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            "description": "19х19 tournament",
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                "id": 15184,
                "name": "Татарстан",
                "summary": "<img src=\"http://kazchess.ru/wp-content/uploads/2020/02/%D1%84%D0%BE%D1%82%D0%BE-%D0%B4%D0%B5%D1%82.jpg\">",
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                "id": 78,
                "name": "OGS Mini Tournaments",
                "summary": "The home for all of the old OGS mini tournaments",
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        {
            "id": 38811,
            "name": "สาระ-rails 361tour ครั้งที่ 1",
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                "id": 148806,
                "username": "โอ๋ชิงหยวน",
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            "description": "\"เส้นทางความรู้ สู่สาระ\" มันก็ต้องใช้เวลาบ้าง แต่ไม่นาน\nIt will be a while,but it won't be long.",
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                "name": "Go World Wide",
                "summary": "enjoy",
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            "name": "HEY! 어서와요",
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            "description": "15급에서 3급 사이가 적당합니다. 다 들어오세요.",
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                "summary": "어린이 특별 환영!\n어른들도 환영합니다.",
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        {
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            "name": "takkaa's mini-tournament",
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                "username": "takkaa",
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            "description": "ลงมาแข่งด้วยกัน",
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                "summary": "กลุ่ม BPK Maklom Academy  มีจุดประสงค์ให้สมาชิกชมรมหมากล้อมโรงเรียนบางปะกอกวิทยาคม และ ลูกศิษย์ในสายสำนัก ได้รวมตัวกัน เพื่อทำกิจกรรมการเรียน การแข่งขันร่วมกัน \n\nห้ามมิให้เชิญบุคคลอื่น ที่ไม่มีส่วนเกี่ยวข้อง เพื่อป้องกันการสับสนในการแข่งขัน และ ส่งข่าวสารก",
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            "description": "Bienvenidos a todos ya entramos al mes de Mayo! Diviértanse y jueguen concentrados!",
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                "name": "Taller de Go-Biblioteca de México",
                "summary": "Torneos todos los sábados a las 17:30 hrs (Ciudad de México)",
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