[Feature request] Pass skype password as input on app startup

[MurzNN]

At now we must put Skype password as plaintext in config.json file, that is not secured. Please allow optionally pass password to app via input on app startup. Via this way we can automate getting password from some secured key storage (for example, gnome keyring), or type it manually at each startup, for don't store it in file as plaintext.

[MurzNN]

Related issue on matrix-hacks/matrix-puppet-bridge#26