Phyn username email address is case sensitive

[Hedda]

Copy from issue posted to upstream by @pickett -> MizterB#3

I was getting an error when trying to first initialize saying User Not Found. I couldn't figure it out but then later realized that the Home Assistant UI on iPad defaults to first letter capitalized for email so if my email username with Phyn was "john@johndoe.com" when I first typed it in, the iPad HA app made it "John@johndoe.com".

Turns out, that was enough to cause an API error. So you might want to make everything lowercase on submit?

[pickett]

@Hedda thanks!