List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=first_pairing_method&page=5629
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "subsequent_pairing_method": "random",
            "min_ranking": 5,
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            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2021-01-07T07:00:31.102163Z",
            "ended": "2021-01-11T01:56:51.011484Z",
            "start_waiting": "2021-01-07T07:00:30.905419Z",
            "board_size": 19,
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    ]
}