    # File lib/fog/ecloud/compute.rb, line 284
            def initialize(options = {})
              require 'fog/core/parser'
              @connections             = {}
              @connection_options      = options[:connection_options] || {}
              @host                    = options[:ecloud_host] || API_URL
              @persistent              = options[:persistent] || false
              @version                 = options[:ecloud_version] || "2012-03-01"
              @authentication_method   = options[:ecloud_authentication_method] || :cloud_api_auth
              @access_key              = options[:ecloud_access_key]
              @private_key             = options[:ecloud_private_key]
              if @private_key.nil? || @authentication_method == :basic_auth
                @authentication_method = :basic_auth
                @username              = options[:ecloud_username]
                @password              = options[:ecloud_password]
                if @username.nil? || @password.nil?
                  raise ArgumentError, "No credentials (cloud auth, or basic auth) passed!"
                end
              else
                @hmac = Fog::HMAC.new("sha256", @private_key)
              end
            end