List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=5585
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "My first created tournament: i enabled handicap to make it fair competition. Lets see how it works. Have fun and good games!",
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            "description": "Merci à tout les participants ^^",
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