Fix for UnboundLocalError: local variable 'loginResult' referenced before assignment

[kengodwin]

If you use API Keys, it generates a local variable error. This should fix it.

[adhawkins]

Thanks for the submission, I'm surprised this hasn't been picked up before. A couple of points:

1. Can you please modify the commit to use a more meaningful commit message.
2. I suspect the same issue would apply in borgbase_repo.py also. Could you fix it there in the same commit.

Thanks

[adhawkins]

Also, the checks have failed due to some whitespace issues. Can you address these and fix them in the same commit?