HB doesn't found any of my shelly devices 
**Describe the bug**
I have installed the plugin. No devices were found. I have 11 devices of shelly (1 and 2.5) all connected to shelly cloud and fully functioning with the shelly app. in the 8181 it says "No devices discovered". Don't know what am I doing wrong.

**Log output**
[04/03/2021, 01:11:08] Loaded plugin: homebridge-shelly@0.18.0
[04/03/2021, 01:11:08] Registering platform 'homebridge-shelly.Shelly'
[04/03/2021, 01:11:08] ---
[Shelly] Initializing Shelly platform...
[Shelly] 0 accessories loaded from cache

**Environment:**
 - Shelly device(s): Shelly 2.5, Shelly 1
 - Plugin version: 0.18.0
 - Device running homebridge: Raspberry Pi 4 8gb
