Gracenote GNuser always returning null

Question

I am new to the Gracenote Api and I was trying to implement it in my Android app after installing the native libraries.

When I try to create a GnUser object it always returns null.

What I am doing is this in my OnCreate:

try {
    gnManager = new GnManager( ActivitySoundSearch.this, gnsdkLicense, GnLicenseInputMode.kLicenseInputModeString );
    gnUser = new GnUser(gnsdkClientId, gnsdkClientTag);
}
catch (Exception e){e.printStackTrace;}

However, GnUser is always null.