LightDMGreeter — Make a connection to the LightDM daemon and authenticate users
LightDMLanguage — Get information on available languages
LightDMLayout — Control the keyboard layout
LightDMSession — Choose the session to use
LightDMUserList — Get information on user accounts on this system
LightDMUser — Get information on a user account
Power Management — Shutdown, restart, sleep the system
System Information — Get system infomation