List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-exclude_provisional&page=4938
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "fghj njklöp",
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            "description": "Please join this tournament and my group and subscribe to zigardd plays.\nEnjoy!!",
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            "description": "優勝者決定戦です~。",
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