List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclusivity&page=277
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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                "username": "milanm",
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                "name": "Massachusetts Go Foundation",
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            "description": "Die Vorgabe ist automatisch,und mit 7 Tage Bedenkzeit eine gute Überbrückung des Lockdowns.\nViel Spaß",
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