public java.util.List<String> getUserIdsToAdd() {
        if (userIdsToAdd == null) {
            userIdsToAdd = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return userIdsToAdd;
    }
<p>
The list of user IDs to add.
</p>

@return The list of user IDs to add.
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/UserGroupPendingChanges.java