    # File lib/fog/aws/requests/iam/list_access_keys.rb, line 41
            def list_access_keys(options = {})
              #FIXME: Doesn't do anything with options, aside from UserName
              user = options['UserName']

              if data[:users].has_key? user
                Excon::Response.new.tap do |response|
                  response.body = { 'AccessKeys' => data[:users][user][:access_keys].map do |akey|
                                                      {'Status' => akey['Status'], 'AccessKeyId' => akey['AccessKeyId']}
                                                    end,
                                     'IsTruncated' => false,
                                     'RequestId' => Fog::AWS::Mock.request_id }
                  response.status = 200
                end
              else
                raise Fog::AWS::IAM::NotFound.new("The user with name #{user} cannot be found.")
              end
            end