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Login into Management Account of your AWS Organization.
Create Zilla-IAM-Reader-Role in all member accounts of AWS organization . using steps - AWS Organization - AWS CloudFormation For Creating Zilla-IAM-Reader-Role In Member Accounts
Create Zilla-IAM-Reader-Role in Management Account of the AWS Organization . using steps - AWS CloudFormation For Creating Zilla-IAM-Reader-Role
Create Zilla-SSO-Reader-Role in Management Account of the AWS Organization . using steps - AWS CloudFormation For Creating Zilla-SSO-Reader-Role