Serverless Programming Cookbook

The CloudFormation template

The template starts as usual, with a template version and a description:

---AWSTemplateFormatVersion: '2010-09-09'Description: Building Cognito API with AWS CloudFormation

We will then create the RestApi resource, as follows:

Resources:  MyFirstRestAPI:    Type: AWS::ApiGateway::RestApi    Properties:      Name: Greeting API      Description: API for greeting an user      FailOnWarnings: true

Next, we will create an authorizer of the type COGNITO_USER_POOLS:

CustomCognitoAuthorizer:  Type: AWS::ApiGateway::Authorizer  Properties:      Name: FirstCognitoAuthorizer      RestApiId: !Ref MyFirstRestAPI      Type: COGNITO_USER_POOLS      ProviderARNs:      - Fn::Sub:        - arn:aws:cognito-idp:${AWS::Region}:${AWS::AccountId}:userpool/${UserPoolId}        - UserPoolId: !ImportValue ...