addUserToGroupAsync not working

[#1]

I am able to create User but not able to add it in group.

I write userId and

groupid as "bd" group title name, i tried with uuid too.

client.addUserToGroupAsync(userId,groupid,
new ApiResponseCallback() {

@Override
public void onException(Exception ex) {
Log.i("AddUserToGroup", ex.getMessage());
}

@Override
public void onResponse(ApiResponse response) {

Editor ed = pref.edit();
ed.putBoolean("activity_newexecuted", true);
ed.commit();
finish();
						    
						}
					});