List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=584
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "the group will change the group name into ' 2021vs '\nat Friday, January 1, 2021                                                      \n                                                                        plese join.",
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