A list of cache security group names to authorize for the clusters in this replication group. This change is asynchronously applied as soon
as possible. This parameter can be used only with replication groups containing cache clusters running outside of an Amazon Virtual Private
Cloud (VPC). Constraints: Must contain no more than 255 alphanumeric characters. Must not be "Default".
Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)