Your login name is the name used to identify an access account on a computer system. It lets the
computer know who is accessing the system.
A login name is normally associated with a password, so that, in order to
gain access to the computer system, you have to provide both your login
name or username and a password. This makes sure that not just anyone
can access the system with your login name, therefore providing you with
security against mischief, impersonation, etc. A password ensures that
only you can access the system to retrieve your email, edit your web page,
transfer files to and from your web site or perform other actions.