List all tournaments or create a new tournament.

GET /api/v1/tournaments/?ordering=-exclusivity&page=5521
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments/?ordering=-exclusivity&page=5520",
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        {
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            "id": 36749,
            "name": "Cybersport.com Beginner Tournament",
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            },
            "description": "Practice Cybersport.com game (#1)\n\n9x9 Boards, if you feel like a game should be reviewed because you have questions or want to review with this game with Sensei Cohen (23kyu), send to #91Go chat and I will review it + comments for you read up on.\n\nInstructions for match to be reviewed:\n1. Open-up side-bar\n2. Click \"Link to Game\"\n3. Send to me on Slack for this game to be reviewed\n4. I will send a link of my review of the game with comments",
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                "name": "Cybersport.com",
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            "name": "有段リーグ(初段以上)",
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                "username": "AYAMI.S",
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