Fix Config Flow Issues

[etmelvin]

Fixes #9

• Added the ability to provide your own access token instead of using proximity authentication
• Fixed an issue where config flow fails on user step when reauth is needed
• Fixed an issue where Home Assistant will discovery the same panel
• Fixed an issue where auth flow on discovery fails on missing access token

[jeffkibuule]

@gdgib Any chance we could get this merged soon? Would love to test it out.

[gdgib]

Thanks for asking @jeffkibuule I apparently had a small email gap in github notifications there. Didn't even see this until you asked.

Even bigger thanks to @etmelvin. Nice work!

[gdgib]

@jeffkibuule let me know when you've tested this. I kinda want to hold off on a release until one of us does, and I won't have time to test before the weekend.

[gdgib]

Hey @etmelvin nice work on this. It's holding up very well so far in testing, and I appreciate the quality of the code.

[jeffkibuule]

Hmm, I'm glad I waited. While I don't have the authentication errors I usually get with HomeAssistant warning me, after a few days, each entity is listed as unavailable at about the same cadence as it previously told me Span wasn't working at all. :(

[etmelvin]

Is there a stack trace or some error logs you can provide?

[gdgib]

Also.... how many days (roughly) are we talking about here?

[jeffkibuule]

False alarm, it's been pretty durable for the last 2 weeks. Glad it got merged. Thank you!