Error Handling - Getting UserId is reference before asignment error

[BlackViper3]

Hi,

I was trying to create a client to Gracenote API and I was getting this error.

G:\Workspace\SongRecommender\pygn.py in register(clientID)
     97 
     98 
---> 99         return userID
    100 #*****************************************************************************************************************************************
    101 # Added by Fabian in order to cover the Rhythm API

UnboundLocalError: local variable 'userID' referenced before assignment

Later, I found that the response to the query was having an error attribute.

Shouldn't the library handle this in pygn.py#97 with an else?