# File lib/fog/aws/requests/iam/remove_user_from_group.rb, line 35
        def remove_user_from_group(group_name, user_name)
          if data[:groups].has_key? group_name
            if data[:users].has_key? user_name
              data[:groups][group_name][:members].delete_if { |item| item == user_name }
              Excon::Response.new.tap do |response|
                response.status = 200
                response.body = { 'RequestId' => Fog::AWS::Mock.request_id }
              end
            else
              raise Fog::AWS::IAM::NotFound.new("The user with name #{user_name} cannot be found.")
            end
          else
            raise Fog::AWS::IAM::NotFound.new("The group with name #{group_name} cannot be found.")
          end
        end