There are still unimplemented parts but user switching, session list in krunner etc are working with KDE master now, so we don't need to implement rest yet.

• DisplayManager
  • AddSeat
  • AddLocalXSeat
  • SeatAdded
  • SeatRemoved
  • SessionAdded
  • SesssionRemoved
  • Seats
  • Sessions
• DisplayManager.Seat
  • SwitchToGreeter
  • SwitchToUser
  • SwitchToGuest
  • Lock
  • CanSwitch
  • HasGuestAccount
  • Sessions
• DisplayManager.Session
  • Lock
  • Seat
  • UserName