List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-min_ranking&page=333
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "What about joining this tournament? And Anyway, Good Game!",
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            "description": "Winners of monthly tournaments will be invited to yearly championship game",
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            "description": "Do you love tournaments? If you do, join this one!",
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        {
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                "name": "iQ-UP Children Go Academy",
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