that complies with its default assumptions, we don't need to specify
the names of the columns where our username and password information
is stored (hence, the "Simple" part of "SimpleDB"). That being said,
-SimpleDB let's you specify that type of information if you need to.
+SimpleDB lets you specify that type of information if you need to.
Take a look at
C<Catalyst::Authentication::Realm::SimpleDB|Catalyst::Authentication::Realm::SimpleDB>
for details.