added 'users database' info label on peewee exception
added 'users database' info label on peewee exception

if you don't read the stack trace is difficult to understand that peewee exceptions
are related to users database stuff. (eg: malformed db connection url)

Adding 'users database' label to those exceptions will help not-dev users to understand
that they are failing on configuring users related stuff

Only exceptions raised upon peewee startup/connection phase will be labeled in this way.

ael-code/libreant,ael-code/libreant,insomnia-lab/libreant,leophys/libreant,insomnia-lab/libreant,insomnia-lab/libreant,ael-code/libreant,leophys/libreant,insomnia-lab/libreant,ael-code/libreant,leophys/libreant,leophys/libreant