List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=exclusivity&page=418
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2021-03-27T12:35:03.272215Z",
            "ended": "2021-03-27T13:35:11.975731Z",
            "start_waiting": "2021-03-27T12:35:03.176111Z",
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}