Tournament List
List all tournaments or create a new tournament.
GET /api/v1/tournaments?format=api&ordering=-board_size&page=3503
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"https://cdn.online-go.com/5.1/img/trophies/gold_title_9.png", "player_count": 12, "ranked": true }, { "id": 109333, "name": "1.. 2.. 3.. 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