chore: remove default username from session value

Remove default username from session value.

chore: remove useless comment

application/Controller/UserController.php

@@ -70,8 +70,7 @@ public function prepare(Request $request, Response $response): Response
         $tplData = [];
         $postData = $request->getParsedBody();
 
-        // TODO: get username from session
-        $this->username = $this->session->get('username', 'davide');
+        $this->username = $this->session->get('username');
         $user = $this->userTable->findByName($this->username);
 
         $tplData['username'] = $this->username;