code: def create_config_backend_options(module_opts, env_name, env_vars):
      
      backend_opts = {}
  
      if module_opts.get('terraform_backend_config'):
          backend_opts['config'] = merge_nested_environment_dicts(
              module_opts.get('terraform_backend_config'),
              env_name
          )
      if module_opts.get('terraform_backend_cfn_outputs'):
          if not backend_opts.get('config'):
              backend_opts['config'] = {}
          if not backend_opts['config'].get('region'):
              backend_opts['config']['region'] = env_vars['AWS_DEFAULT_REGION']
  
          boto_args = extract_boto_args_from_env(env_vars)
          cfn_client = boto3.client(
              'cloudformation',
              region_name=backend_opts['config']['region'],
              **boto_args
          )
          for (key, val) in merge_nested_environment_dicts(module_opts.get('terraform_backend_cfn_outputs'),  # noqa pylint: disable=line-too-long
                                                           env_name).items():
              backend_opts['config'][key] = find_cfn_output(
                  val.split('::')[1],
                  cfn_client.describe_stacks(
                      StackName=val.split('::')[0]
                  )['Stacks'][0]['Outputs']
              )
  
      return backend_opts
docs: Return backend options defined in module options.