added red asterix to required input field

cao_blogr/templates/user_add.jinja2

@@ -9,7 +9,7 @@
         {% endfor %}
 
         <div class="form-group">
-            <label for="title">{{form.username.label}}</label>
+            <label class="required-field" for="username">{{form.username.label}}</label>
             {{form.username(class_='form-control')}}
         </div>
 
@@ -18,7 +18,7 @@
         {% endfor %}
 
         <div class="form-group">
-            <label for="body">{{form.password.label}}</label>
+            <label class="required-field" for="password">{{form.password.label}}</label>
             {{form.password(class_='form-control')}}
         </div>