code: def create_stack_template(  self,
                                  lambda_arn,
                                  lambda_name,
                                  api_key_required,
                                  iam_authorization,
                                  authorizer,
                                  cors_options=None,
                                  description=None,
                                  endpoint_configuration=None
                              ):
          
  
          auth_type = "NONE"
          if iam_authorization and authorizer:
              logger.warn("Both IAM Authorization and Authorizer are specified, this is not possible. "
                          "Setting Auth method to IAM Authorization")
              authorizer = None
              auth_type = "AWS_IAM"
          elif iam_authorization:
              auth_type = "AWS_IAM"
          elif authorizer:
              auth_type = authorizer.get("type", "CUSTOM")
  
          # build a fresh template
          self.cf_template = troposphere.Template()
          self.cf_template.add_description('Automatically generated with Zappa')
          self.cf_api_resources = []
          self.cf_parameters = {}
  
          restapi = self.create_api_gateway_routes(
                                              lambda_arn,
                                              api_name=lambda_name,
                                              api_key_required=api_key_required,
                                              authorization_type=auth_type,
                                              authorizer=authorizer,
                                              cors_options=cors_options,
                                              description=description,
                                              endpoint_configuration=endpoint_configuration
                                          )
          return self.cf_template
docs: Build the entire CF stack.
          Just used for the API Gateway, but could be expanded in the future.