List all tournaments or create a new tournament.

GET /api/v1/tournaments/?ordering=board_size&page=5883
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "YAAAAY! We broke our 100th member goal!\n\n100th member: @P6A26\n\nJoin the tournament for group spirit!",
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