List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=id&page=2747
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "Il gruppo per i giocatori di GO italiani.",
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            "id": 67125,
            "name": "The 28th Murase Go Group Tournament",
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            "name": "Greg's Monthly 9x9 Tournament November 2020",
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            "description": "Seems like these tournaments never go anywhere.  This one will!",
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        {
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            "name": "Live 9x9 Double Elimination Tournament 2020-10-27 18:30",
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        {
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