Shelly plug-in doesn't work anymore
Hi, I use the plugin on raspberry 3+, it has always worked perfectly (I use shelly without a cloud and with a password), after a reboot I realized that there were errors regarding the impossibility to read the configuration and it was wrong user and pwd

**[homebridge-shelly.Shelly] Failed to load device settings
[2019-12-6 12:44:36 PM] [homebridge-shelly.Shelly] Wrong username or password (device SHSW-21 32B922,**

it was impossible because it never change. SoI tried to disable pw on shellys.
At homebridge startup everything seems to be in place, the 5 shellys and additions are identified,
 
**[2019-12-6 1:16:47 PM] [homebridge-shelly.Shelly] 5 devices loaded from cache
[2019-12-6 1:16:47 PM] Homebridge is running on port 46501.**


but in homekit app the previous devices appear as  they are disconnected and no longer work and there are no new device.

----- post update
it seems a grant problem somewhere, if I stop Homebridge service and I start it from terminal as a "pi' user (no sudo) typing _Homebridge_ everything works.

I have try to do the same on another rasp (but is a rasp4) after a new installation of Homebridge, with never version of Nodejs (10.7) and the last of shelly plug in and the problem remain the same, but on this I even can't run with pi user from command line, same error 

[2019-12-6 6:50:51 PM] [homebridge-shelly.Shelly] Failed to load device settings
[2019-12-6 6:50:51 PM] [homebridge-shelly.Shelly] Wrong username or password (device...