@Override
protected void listUsers() {
if (group != null) {
users = iam.getGroup(new GetGroupRequest(group.getGroupName())).getUsers();
} else {
users = null;
}
}
private void removeUser(String userName) {
iam.removeUserFromGroup(
new RemoveUserFromGroupRequest()
.withGroupName(group.getGroupName())
.withUserName(userName));
}