List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=5343
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "exclusivity": "open",
            "started": "2021-08-18T07:24:26.400175Z",
            "ended": "2022-01-05T15:32:37.396723Z",
            "start_waiting": "2021-08-18T07:24:26.266553Z",
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}