main.rb

# client code
require 'intercom'

#replace with your values 
intercom = Intercom::Client.new(token: 'my_token')
convos =  intercom.conversations.find_all(user_id: 'some_user_id', type: 'user')
convos.each { |x| puts x.id }

# sample output one
===> looneym ~/ruby-api-test ruby test.rb
7047773685
7046294106

#sample output two 
===> looneym ~/ruby-api-test ruby test.rb
7048452436
7048451205
7034280134