def METHOD_NAME(self, params):
    sys.stdout.write('Creating the IAM user... ')
    params.user_name = params.instance_name
    response = self.iam.create_user(
        Path='/AWS/CodeDeploy/',
        UserName=params.user_name
    )
    params.iam_user_arn = response['User']['Arn']
    sys.stdout.write(
        'DONE\n'
        'IamUserArn: {0}\n'.format(
            params.iam_user_arn
        )
    )