Tournament List
List all tournaments or create a new tournament.
GET /api/v1/tournaments?format=api&ordering=-exclusivity&page=3345
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"board_size": 9, "active_round": null, "icon": "https://user-uploads.online-go.com/b1a8e87e33263bc92ccdc6303c0c184c-15.png", "player_count": 2, "ranked": true } ] }
