List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=exclusivity&page=64
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=63",
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            "description": "Und wieder steht ein Go Turnier an!",
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                "id": 13073,
                "name": "Let's GameDev",
                "summary": "In dieser Gruppe soll ein kleines Go Turnier für die Let's GameDev Community stattfinden.",
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