# File lib/deltacloud.rb, line 404
      def initialize(opts={})
        opts[:message] = "Not authorized / Invalid credentials" if opts[:code] == 401
        super("#{opts[:code]} : #{opts[:message]}")
        set_backtrace(opts[:backtrace].split("\n").map { |l| l.strip }[0..10]) if opts[:backtrace]
      end