If you use Skype with different accounts then you must have noticed that Skype remembers all the usernames that you have logged in. The login screen has all the list of usernames. So, if you want to stop the names showing up in the login screen for some reason then follow these steps:
For Windows Users:
- Quit Skype if running, open Run.
- Type in %AppData%/Skype, hit Enter.
- Then, delete the folder with your Skype username.
For Linux Users:
- Quit Skype if running.
- Go to the folder: /home/YOURLINUXUSERNAME/.Skype
- Then, delete the folder with your Skype username.
Done !