List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-player_count&page=5903
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "name": "GO Special Tournaments",
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            "name": "9x9 Open D.E. Cup #218",
            "director": {
                "id": 1015644,
                "username": "wiadp1",
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                "icon": "https://user-uploads.online-go.com/253ed3da1cc83d36ac1e5313f959f54d-64.png",
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            "description": "Double-Elimination tournament for everyone. It will be started as soon as 8 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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                "id": 3524,
                "name": "9x9 Lovers",
                "summary": "A group for Go players who love the 9x9 board.",
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            "id": 136273,
            "name": "Stasiek i Maciej",
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                "id": 1927322,
                "username": "maciej.zagozda",
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            "description": "Opis turnieju",
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                "name": "grupa",
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