List all tournaments or create a new tournament.

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

{
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            "description": "If you want to be stronger, then you should often play with those who are a little stronger than you. Training Grounds tournaments provide you with this opportunity.",
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            "description": "dritter Turnierblock für Kyu-Spieler",
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            "name": "pa la gente shida :D",
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