List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=board_size&page=3754
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Another tournament for fun.",
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            "name": "\"С НАЧАЛОМ ВЕСНЫ!\" (дружественный турнир)",
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                "username": "Карпов Андрей",
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            "description": "Дружественный турнир \"С началом весны!\" представляет собой турнир в котором может поучаствовать каждый желающий. Это просто место где соберутся все желающие отметить начало весны 2017 года игрой в Го. Мы будем рады каждому кто присоединится к нам!\n\nЖелаем удачи!",
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                "name": "Го-клуб \"КОСУМИ\", Одесса",
                "summary": "Одесский клуб Го \"Косуми\" был основан 14 марта 1994 года в составе Объединения молодёжных клубов Тростом Виталием Анатолиевичем и группой единомышленников",
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        {
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            "description": "Automatic Sitewide Tournament",
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        {
            "id": 24407,
            "name": "Tournoi des 50 nuances de Go (Test #03)",
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                "username": "HisokaH",
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            "description": "Un nouveau tournoi test est lancé. Cette fois-ci, je vous propose un tournoi en temps réel qui se déroulera sur la journée du dimanche 19 février à partir de 13h (Soyez sûr d'être là un peu avant 13h sinon vous serez exclu du tournoi !) Il y aura 4 rondes, aucune élimination.\n\nTournoi sans handicap mais vous affronterez normalement quelqu'un dont la force est similaire à la votre. :)\n\nJ'espère que cela vous intéressera encore plus qu'avant ! :)\n\nMerci de votre participation, bon amusement à toutes et à tous ! S'il y a des questions, n'hésitez pas !",
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            "group": {
                "id": 1355,
                "name": "FulguroGo",
                "summary": "Apprendre le Go pour joueurs débutants et confirmés.",
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