List all tournaments or create a new tournament.

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HTTP 200 OK
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Content-Type: application/json
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                "summary": "If you've ever played, or are not 100% ruling out ever playing, in the tournament held every second year in the Isle of Skye, Scotland, then you qualfy for this group.",
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            "description": "Este es el último entrenamiento antes del Campeonato. ¡Disfrútenlo y aprovéchenlo! ¡Que tengan buenos juegos!",
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