    # File lib/fog/aws/credential_fetcher.rb, line 8
            def fetch_credentials(options)
              if options[:use_iam_profile]
                begin
                  connection = options[:connection] || Excon.new(INSTANCE_METADATA_HOST)
                  role_name = connection.get(:path => INSTANCE_METADATA_PATH, :expects => 200).body
                  role_data = connection.get(:path => INSTANCE_METADATA_PATH+role_name, :expects => 200).body

                  session = Fog::JSON.decode(role_data)
                  credentials = {}
                  credentials[:aws_access_key_id] = session['AccessKeyId']
                  credentials[:aws_secret_access_key] = session['SecretAccessKey']
                  credentials[:aws_session_token] = session['Token']
                  credentials[:aws_credentials_expire_at] = Time.xmlschema session['Expiration']
                  #these indicate the metadata service is unavailable or has no profile setup
                  credentials
                rescue Excon::Errors::Error => e
                  Fog::Logger.warning("Unable to fetch credentuals: #{e.message}")
                  super
                end
              else
                super
              end
            end