Thrown when attempting to authenticate with a principal that doesn't exist in the system (e.g.
by specifying a username that doesn't relate to a user account).
<p>Whether or not an application wishes to alert a user logging in to the system of this fact is
at the discretion of those responsible for designing the view and what happens when this
exception occurs.
Thrown when attempting to authenticate with a principal that doesn't exist in the system (e.g. by specifying a username that doesn't relate to a user account).
<p>Whether or not an application wishes to alert a user logging in to the system of this fact is at the discretion of those responsible for designing the view and what happens when this exception occurs.