Fix for failed authentiction

[ColinRobbins]

Sorry - looks like I messed up the pull request, as I have this fixed in my development tree.

Description

Motivation and Context

Fixes: https://github.com/HandyHat/ha-hildebrandglow-dcc/issues/69

How Has This Been Tested?

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

[HandyHat]

No problem. Thanks!