List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=5221
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=5220",
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            "description": "Der Jugendclub-Skandal in Friedrichshain starte seine online Go-Turnier-Serie mit einem 9x9 Turnier. \nViel Spass und spannende Partien.",
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            "description": "Start when Tournament have 22 players",
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        {
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            "name": "Swiss Byo-Yomi  Live CHinese 19X19 Open Coke Tournament",
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                "username": "Likerofgo",
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            "description": "Drink Coke while playing.",
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