List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=max_ranking&page=403
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "name": "OGS Mini Tournaments",
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            "name": "Hello November",
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            "description": "Hi Long time no tournament. This is a round-robin tournament for beginners, so expect a lot of games coming at one time. Also, this tournament is limited to 10 players.",
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                "name": "Happy Beginners",
                "summary": "Good luck and have fun everyone :)",
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                "id": 78,
                "name": "OGS Mini Tournaments",
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                "username": "eaglejoy",
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                "summary": "Middle speed matches, not so hurry, not so slow.",
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            "description": "Play go \nfun fun",
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