List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=board_size&page=1484
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "id": 497519,
                "username": "Kosh-retired",
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            "description": "### ! Does NOT pause on the weekend !\n\n<body>\n  <h2 style=\"color:red\">This tournament is for players that don't use vacation.</h2>\n</body>\n\n---\n\n- Just one round of simultaneous games. Chinese Rules/Scoring.\n\n- This is a '**FAST** Correspondence Tournament'. Please avoid delaying your games using the Vacation feature or Pause. Any participant using Vacation or Pause may be disqualified (and forfeit unfinished games) at the discretion of the Tournament Director.\n\n- Please make sure you understand the [**'Clock' settings**](https://github.com/online-go/online-go.com/wiki/Finding-(starting)-a-game#basic-time-controls-explained) before you join this tournament.  It typically takes 2-3 weeks to complete and you will need to log on and play at two well-spaced times most days to avoid losing by timeout.\n\n- If this suits you then, Bonne Partie....and please invite your friends. :)",
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            "title": null,
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            "rules": "chinese",
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            "auto_start_on_max": false,
            "time_start": "2020-03-18T22:57:00Z",
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            "subsequent_pairing_method": "slaughter",
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            "ended": "2020-04-08T22:33:47.496129Z",
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            "description": "Special league for players between 25kyu and 10kyu. Tournament will be started as soon as 5 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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                "id": 3524,
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        {
            "id": 50100,
            "name": "Tournament For Beginners (Starts on Sunday)",
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                "id": 488500,
                "username": "Picard",
                "country": "un",
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            "description": "IF THERE ? MARK(Provisional rank) NEAR BY YOUR USERNAME YOU HAVE TO PLAY MORE RANKED GAMES ABOUT 10(TOTAL) TO GET RANKED AND THEN IF 20K-25K YOU CAN JOIN THIS TOURNAMENT\n\nLEARN TO PLAY GO https://online-go.com/learn-to-play-go\n\nThere is documentary about go SURROUNDING GAME, ALPHA GO and anime HIKARU NO GO\n\nTO JOIN OTHER TOURNAMENTS VISIT THE GROUP PAGE https://online-go.com/group/2946\n\nThere is lots of useful links https://online-go.com/group/25, //// https://online-go.com/group/2014",
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