List voice servers

curl --request POST \
  --url https://api.fluxer.app/v1/admin/voice/servers/list \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "region_id": "<string>"
}
'

{
  "servers": [
    {
      "region_id": "<string>",
      "server_id": "<string>",
      "endpoint": "<string>",
      "is_active": true,
      "vip_only": true,
      "required_guild_features": [
        "<string>"
      ],
      "allowed_guild_ids": [
        "<string>"
      ],
      "allowed_user_ids": [
        "<string>"
      ],
      "created_at": "<string>",
      "updated_at": "<string>"
    }
  ]
}