diff --git a/lib/BeastBB/DAO/UserManager.pm b/lib/BeastBB/DAO/UserManager.pm
index 4012055..e8e6e4e 100644
--- a/lib/BeastBB/DAO/UserManager.pm
+++ b/lib/BeastBB/DAO/UserManager.pm
@@ -8,16 +8,19 @@ use warnings;
 use Carp;
 
 use Params::ValidationCompiler 'validation_for';
-use Types::Standard qw/Bool Str/;
+use Types::Standard qw/Bool Str Int/;
 
 use Crypt::Bcrypt::Easy;
 use Const::Fast;
 use DateTime;
+use DateTime::Format::ISO8601;
 
 use BeastBB::Types (
     '$MATRIX_ADDRESS_REGEX', 'IsClassTypeGenerator',
     '$MATRIX_ADDRESS_TYPE'
 );
+use BeastBB::DAO::GroupManager;
+use BeastBB::Model::User;
 use BeastBB::Response;
 
 const my $MINIMUM_PASSWORD_LENGHT => 8;
@@ -71,14 +74,14 @@ const my $MINIMUM_PASSWORD_LENGHT => 8;
             )
         );
         return $maybe_user_hash if $maybe_user_hash->IsError;
-        $user_hash = $maybe_user_hash->Content;
+        my $user_hash = $maybe_user_hash->Content;
         my $id_group = delete $user_hash->{id_group};
         my $user     = BeastBB::Model::User->new(%$user_hash);
 
         if ($recover_group) {
             my $maybe_recovered_group =
               $self->_RecoverUserGroup( id_group => $id_group, user => $user );
-              return $maybe_recovered_group if $maybe_recovered_group->IsError;
+            return $maybe_recovered_group if $maybe_recovered_group->IsError;
         }
         return BeastBB::Response->new( content => $user );
     }
@@ -161,7 +164,7 @@ const my $MINIMUM_PASSWORD_LENGHT => 8;
           DateTime::Format::ISO8601->parse_datetime(
             $user_hash->{last_connection} );
 
-        return BeastBB::Response( content => $user_hash );
+        return BeastBB::Response->new( content => $user_hash );
     }
 }
 
diff --git a/lib/BeastBB/Model/User.pm b/lib/BeastBB/Model/User.pm
index d7d1210..90824d7 100644
--- a/lib/BeastBB/Model/User.pm
+++ b/lib/BeastBB/Model/User.pm
@@ -51,7 +51,7 @@ sub Hash {
         ),
         (
               ( !$self->Group->IsError )
-            ? ( group => $self->Group->Content->hash )
+            ? ( group => $self->Group->Content->Hash )
             : ()
         ),
         username        => $self->Username,
@@ -87,7 +87,7 @@ sub Hash {
                 error_message => 'No group recovered for this user.',
             );
         }
-        return BeastBB::Model::Group->new(
+        return BeastBB::Response->new(
             content => $self->{group},
         );
     }
diff --git a/t/DAO/00-group-manager.t b/t/DAO/00-group-manager.t
index 73b53c3..0fcf2fb 100644
--- a/t/DAO/00-group-manager.t
+++ b/t/DAO/00-group-manager.t
@@ -8,17 +8,14 @@ use warnings;
 use Const::Fast;
 
 use BeastBB::Mock::Controller;
-use BeastBB::DAO::GroupManager;
-
-use Data::Dumper;
-
-const my $APP           => BeastBB::Mock::Controller->new;
-const my $GROUP_MANAGER => BeastBB::DAO::GroupManager->new( app => $APP );
 
 {
     use_ok 'BeastBB::DAO::GroupManager';
 }
 
+const my $APP           => BeastBB::Mock::Controller->new;
+const my $GROUP_MANAGER => BeastBB::DAO::GroupManager->new( app => $APP );
+
 {
     $APP->db->Mock(
         sql =>
diff --git a/t/DAO/01-user-manager.t b/t/DAO/01-user-manager.t
new file mode 100644
index 0000000..85906b5
--- /dev/null
+++ b/t/DAO/01-user-manager.t
@@ -0,0 +1,83 @@
+use 5.32.1;
+
+use Test::Most tests => 5;
+use Test::MockModule;
+
+use strict;
+use warnings;
+
+use Data::Dumper;
+
+use Const::Fast;
+use Crypt::Bcrypt::Easy;
+
+use BeastBB::Mock::Controller;
+use BeastBB::Model::Group;
+
+{
+    use_ok 'BeastBB::DAO::UserManager';
+}
+
+const my $APP          => BeastBB::Mock::Controller->new;
+const my $USER_MANAGER => BeastBB::DAO::UserManager->new( app => $APP );
+
+const my %USER_PARAMS => (
+    id_user         => 1,
+    username        => 'example_username',
+    matrix_address  => '@example_username:example.com',
+    password_bcrypt => bcrypt->crypt('example_password'),
+    is_confirmed    => 1,
+    creation_date   => DateTime->new( year => 2021, month => 06, day => 3 ),
+    last_connection => DateTime->now,
+);
+
+{
+    my @results;
+    my @user_keys = keys %USER_PARAMS;
+    push @results, [@user_keys];
+    push @results, [ map { $USER_PARAMS{$_} } @user_keys ];
+    $APP->db->Mock(
+        sql =>
+          'SELECT "id_user", "username", "matrix_address", "password_bcrypt", "is_confirmed", "creation_date", "id_group", "last_connection" FROM "user" WHERE "username" = ?',
+        results => \@results,
+    );
+    my $maybe_user = $USER_MANAGER->Get( username => 'example_user' );
+    die $maybe_user->ErrorMessage if $maybe_user->IsError;
+    my $user = $maybe_user->Content;
+    ok $user->isa('BeastBB::Model::User'),
+      'User is made of BeastBB::Model::User';
+    is_deeply $user->Hash, \%USER_PARAMS, 'User to hash conversion works ok.';
+}
+
+{
+    my $test_mock_module_group_manager =
+      Test::MockModule->new('BeastBB::DAO::GroupManager');
+    my $group =
+      BeastBB::Model::Group->new( id_group => 1, groupname => 'example_group' );
+    $test_mock_module_group_manager->mock(
+        Get => sub {
+            my $self = shift;
+            return BeastBB::Response->new( content => $group );
+        }
+    );
+    my @results;
+    my %user_params        = %USER_PARAMS;
+    my %user_hash_expected = ( %user_params, group => $group->Hash );
+    $user_params{id_group} = 1;
+    my @user_keys = keys %user_params;
+    push @results, [@user_keys];
+    push @results, [ map { $user_params{$_} } @user_keys ];
+    $APP->db->Mock(
+        sql =>
+          'SELECT "id_user", "username", "matrix_address", "password_bcrypt", "is_confirmed", "creation_date", "id_group", "last_connection" FROM "user" WHERE "username" = ?',
+        results => \@results,
+    );
+    my $maybe_user =
+      $USER_MANAGER->Get( username => 'example_user', recover_group => 1 );
+    die $maybe_user->ErrorMessage if $maybe_user->IsError;
+    my $user = $maybe_user->Content;
+    ok $user->isa('BeastBB::Model::User'),
+      'User is made of BeastBB::Model::User when trying to recover also a group.';
+    is_deeply $user->Hash, \%user_hash_expected,
+      'User to hash conversion works ok.';
+}