Getting Mixpanel profiles where property "Name" is not set.

mp_profiles.rb

require 'rubygems'
require 'mixpanel_client'

config = {api_key: 'FOO', api_secret: 'BAR'}
client = Mixpanel::Client.new(config)

data = client.request('engage', {
  where: 'not defined(properties["Name"])'
})

p data['results']