Clear history of usernames in Skype [duplicate]

Step-by-step:

  • Click the Start menu
  • Click Run (or just press WinKey+R)
  • Type %AppData%/Skype
  • Press Enter on your keyboard
  • In the folder that appears, look for a folder named with the user you want to get rid of
  • Delete that folder.

That should clear the username from your login field.