List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=5390
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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    "previous": "https://online-go.com/api/v1/tournaments?format=api&ordering=-max_ranking&page=5389",
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        {
            "id": 124920,
            "name": "Servus Oida Open Tournament #10",
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                "id": 1285178,
                "username": "VikingKoala",
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            "description": "McMahon Kyu Player Tournament",
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                "name": "Outside Go7",
                "summary": "Die Gruppe für alle, die sonst im Go7 spielen.",
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        {
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            "description": "This tournament is for November when the rain coming! \nHaving a tea and play go with a friend, it will make you warmer,\neven in the cold November rain:).\n\nPlease join and find some tips for better play in this group and group:\nhttps://online-go.com/group/4006\n\nAlso at library of this website!\nThank you!",
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                "summary": "A group for kyu level players! Join, play tournaments, and have fun. Thanks for being a part of our community!",
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