How to logon via sapgui without entering u sername and password

sapgui640 from each log to enter a password (to)
1、Start > Run > sapshcut.exe
2、Start > Run > regedit
HKEY_CURRENT_USER \ Software \ SAP \ SAPShortcut \ Security
Change value of EnablePassword from 0 to 1
3, SAP sign of a shortcut.