Edited Issue: CredentialsCreator_WithCaptcha_StepByStep throws TwitterCredentialsNullException [2355]

Hi,

I think this is not the correct behavior.

If you comment line 36 in ExampleInvi (the line where it sets the credentials the credentials) and then run the CredentialsCreator_WithCaptcha_StepByStep() method, it throws TwitterCredentialsNullException when trying to get the credentials.

This means we have to set dummy credentials before trying to generate new ones.

Thanks,
imlokesh