List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-id&page=2414
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=-id&page=2413",
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            "name": "bots tournament",
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                "username": "I am kill",
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            "description": "If your rank changes to be outside the tournament Rank Restriction, please move yourself to the appropriate tournament. Enjoy your games.",
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