List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-id&page=3652
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "Um einen Preis zu gewinnen, muss man sich zusätzlich über die Website badengo.org anmelden. Mitspielen darf jeder ab 20. Kyu - eine Runde wird etwa 1 - 1,5h Stunden gehen.",
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            "name": "Blitz 13x13 Swiss Tournament 2020-03-26 15:30",
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            "description": "our first tourney",
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