fix database initialisation

bin/access-check-manager.pl

@@ -16,6 +16,7 @@ use Pod::Usage;
 use Syntax::Keyword::Try;
 
 use AccessCheck::Data::Account;
+use AccessCheck::Data::DB;
 use AccessCheck::Data::Entity;
 use AccessCheck::Data::Token;
 use AccessCheck::Metadata;
@@ -51,7 +52,7 @@ if (!$configuration) {
     die Config::Tiny->errstr() . "\n";
 }
 
-AccessCheck::DB->register_db(
+AccessCheck::Data::DB->register_db(
     driver   => $configuration->{database}->{type},
     database => $configuration->{database}->{name},
     host     => $configuration->{database}->{host},
@@ -64,7 +65,7 @@ AccessCheck::DB->register_db(
     ]
 );
 
-my $db = AccessCheck::DB->new();
+my $db = AccessCheck::Data::DB->new();
 
 SWITCH: {
     if ($action eq 'add_account')    { add_account();    last SWITCH; }