List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=time_start&page=3564
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=time_start&page=3563",
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            "description": "Have fun! Everybody's welcome!",
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            "description": "#RESPECT\n\nNot only a few close friends were invited, we have a warm welcome for everyone.",
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