In computer security, logging in (or logging on, signing in, or signing on) is the process by
which an individual gains access to a computer
                system by identifying and authenticating themselves. The user credentials are typically some
                form of "username" and a matching "password",[1] and these credentials themselves are
                sometimes referred to as a login (or a logon or a sign-in or a sign-on).[2][1] In practice, modern
                secure systems often require a second factor such as email or SMS confirmation for extra
                security.
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