List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-name&page=343
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?format=api&ordering=-name&page=342",
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        {
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                "name": "USMKKJ Chess",
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        {
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                "summary": "Hi, this is a group for players with 25kyu till 1kyu. Especially beginners are welcome! In this group everyone should be able to play, without having to pay attention on the rank difference problem.",
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