Hi All,
First of all @awiouy thx for great job with the addon.
Now my actual question 
I am using two accounts for spotify on my home network. It is a way to use discovery to register different users without reconfigure an addon? Currently even when restarting device, discovery service always choose the same user. I even try to remove all instances of spotify from the network, but that won't worked too.
Code
Jan 02 22:14:07 kodi systemd[1]: Started librespot.
Jan 02 22:14:07 kodi sh[1369]: INFO:librespot: librespot 83282b6 (2017-12-07). Built on 2017-12-07. Build ID: lUgmv2c5
Jan 02 22:14:07 kodi sh[1369]: INFO:librespot_core::session: Connecting to AP "gew1-accesspoint-b-4nz6.ap.spotify.com:4070"
Jan 02 22:14:07 kodi sh[1369]: INFO:librespot_core::session: Authenticated as "*****" !
Jan 02 22:14:07 kodi sh[1369]: INFO:librespot_core::session: Country: "PL"
Jan 02 22:14:07 kodi sh[1369]: INFO:librespot::audio_backend::alsa: Using alsa sink
kodi:~ #Could someone link a reference or briefly describe how this discovery service is working? I tried to read the code, but I do not know RUST, so it is waste of time for me.