MB-20577 Handle cases where username not specified
MB-20577 Handle cases where username not specified

Change-Id: Ic1847688842cc6bdded462e490a8610af544b1fd
Reviewed-on: http://review.couchbase.org/67091
Reviewed-by: Sitaram Vemulapalli <8d86a491dcdf321bac78bef141a8229a59bf9211@couchbase.com>
Tested-by: Isha Kandaswamy <e3cc845ebc6144fc4d71cf5f07a0ce9db6fdfa91@couchbase.com>

couchbaselabs/godbc