List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-subsequent_pairing_method&page=5586
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "to celabrate crismas (I am just 6 so im not so good at spelling stuff)",
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            "description": "楽しく打ちましょう。\n皆様の参加をお待ちしています!",
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            "description": "16th happy tourney, I will create a new tournament with this name every Monday, have fun!",
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