List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-board_size&page=512
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Dear guests of the tournament, come to the next tournament there are only 3 of them! You are invited to participate in the following!",
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