Tournament List
List all tournaments or create a new tournament.
GET /api/v1/tournaments/?format=api&ordering=board_size&page=5016
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"2016-05-19T09:30:06.372998Z", "ended": "2016-05-19T09:55:31.995592Z", "start_waiting": "2016-05-19T09:30:06.235379Z", "board_size": 19, "active_round": null, "icon": "https://cdn.online-go.com/5.1/img/trophies/gold_title_19.png", "player_count": 5, "ranked": true }, { "id": 107797, "name": "19x19 Open D.E. 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