添加了用户管理，并且支持了部分免密

frontend/Web/login.html

@@ -76,7 +76,7 @@
       <div class="login-box">
         <form onsubmit="console.log('trying login'); TryLogin(); return false;">
             <input id="user_name" type="text" placeholder="Username" required>
-            <input id="password" type="password" placeholder="Password" required>
+            <input id="password" type="password" placeholder="Password">
             <button type="submit">Login</button>
         </form>
     </div>