List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=players_start&page=402
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=players_start&page=401",
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            "id": 94505,
            "name": "9x9 - 7 days absolute time.",
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                "username": "🐬Sofiam🐬",
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            "description": "Everyone is welcome.\n\nPlease avoid delaying games using \"pause\" or \"vacation\".",
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                "name": "Go friends 🐬",
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