List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclusivity&page=8
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments?format=api&ordering=exclusivity&page=7",
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            "description": "Bienvenue au 1er tournoi du Let's Go !  \n\nBonne parties à tous ! Have fun, everyone !",
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