# Get twilio-ruby from twilio.com/docs/ruby/install
require 'rubygems' # This line not needed for ruby > 1.8
require 'twilio-ruby'

# Get your Account Sid and Auth Token from twilio.com/user/account
account_sid = 'ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
auth_token = 'your_auth_token'
@client = Twilio::REST::Client.new account_sid, auth_token

@credential = @client.account.sip
                     .credential_lists
                     .get('CL32a3c49700934481addd5ce1659f04d2')
                     .credentials
                     .get('SC32a3c49700934481addd5ce1659f04d2')

@credential.delete
