# File lib/fog/aws/requests/iam/create_user.rb, line 39
        def create_user(user_name, path='/')
          if data[:users].has_key? user_name
            raise Fog::AWS::IAM::EntityAlreadyExists.new "User with name #{user_name} already exists."
          else
            data[:users][user_name][:path] = path
            Excon::Response.new.tap do |response|
              response.status = 200
              response.body = { 'User' => {
                                           "UserId"   => data[:users][user_name][:user_id],
                                           "Path"     => path,
                                           "UserName" => user_name,
                                           "Arn"      => (data[:users][user_name][:arn]).strip
                                           },
                                'RequestId' => Fog::AWS::Mock.request_id
                               }
            end
          end
        end