unify the enrollment of users by usb drives or local
-- add refresh button (Cristian)
-- check if the user is root (id -r -u)
-- add main screen to root user (Cristian)
-- check if the user is a server user (Thiago)
-- create add HD user (Thiago)
ID RANGES(add variables)
10000-19999 - USB DRIVE
20000-29999 - LOCAL USER
30000-39999 - GLOBAL ID
--
add user