List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-rules&page=5718
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Finals Qualifying:<br />\n Top 3 in Group A<br />\n Top 2 in Group B<br />\n Top 1 in Group C<br />\n Top 1 in Group D<br />\n Top 2 in the previous round <br />",
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