Couchbase 5.0.0 April Build Authentication failed using node js

Using the current 5.0.0 April release my node js client now fails to open a bucket with the following error:
Authentication failed. You may have provided an invalid username/password combination

The March release worked just fine. Is there something new with authentication in the April release? I have a username and password configured for the cluster but not at the bucket level. I noticed the installation was slightly different this time around. Any help moving forward would be appreciated.

Sandy.