Ok, stated my limited experience, i just only to say that probably you need ZXappz::Database anyway because it can contains for example store_new_user and store_action_for_user and so on. So in the main code you can just:

my $appdb = ZXappz::Database->new();

$appdb->store_new_user($previously_generated_name,time); # uses DBI to
+ insert into a table

..

$appdb->close # call the DBI's close but maybe also log somewhere the 
+succesfull operation
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