Correct answer - "IAM permissions with sigv4" : Although you can grant user access to the API
created with API Gateway at the individual IAM user level, it is recommended that you grant
access to Amazon API Gateway APIs at the IAM group level.
Incorrect:
"Lambda Authorizer" - With Lambda Authorizer you must first create the AWS Lambda function that
implements the logic to authorize and, if necessary, to authenticate the caller which is not
easier than setting permissions with IAM
"Cognito User Pools" - This option can be used to authenticate users through an external identity
provider and provide temporary security credentials to access Amazon API Gateway.