in config/iam-policies.js [22:30]
function getPolicies(){
//Check if policy names exist in policies.json
const { policy_names } = policies;
if(policy_names.length === 0){
throw new Error('No policies are defined in policies.json');
}else{
return policy_names.map((elem) => iam.ManagedPolicy.fromAwsManagedPolicyName(elem));
}
}