List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=4848
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Welcome to the group stage!The tournament will begin when the 1st round of the tournament 67762 ends.If there are 500 people, then the tournament will also start. This is the 2nd condition.3 condition it will start on June 1.",
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