List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-rules&page=5622
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "require_invitation": false,
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            "time_start": "2018-04-03T18:00:00Z",
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            "first_pairing_method": "random",
            "subsequent_pairing_method": "random",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": false,
            "exclusivity": "open",
            "started": "2018-04-03T18:00:36.500752Z",
            "ended": "2018-04-03T18:33:38.573820Z",
            "start_waiting": "2018-04-03T18:00:35.886768Z",
            "board_size": 9,
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            "player_count": 4,
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