Jeff Morris added a comment - 10/Aug/17 7:38 PM - edited Tests exist to show that SetAuthenticate was intended to be used to pass the IAuthenticator, however this is an internal method, so it will not work for any external applications: https://github.com/couchbase/couchbase-net-client/commit/332ffebfc2284602d736b65183892f812ebd95f2  

Jeff Morris added a comment - 10/Aug/17 7:49 PM This code will not work: var config = TestConfiguration.GetDefaultConfiguration(); var authenticator = new PasswordAuthenticator( "myuser" , "myuserpassword" ); config.SetAuthenticator(authenticator);   ClusterHelper.Initialize(config); var bucket = ClusterHelper.GetBucket( "default" ); The reason being that "default" and null will be used instead of the username and password from the IAuthenticator.