add warning and erros messages in template

templates/user/create_user.twig

 {% extends 'common/layout.twig' %}
 {% block content %}
-<form class="ui form" action="/users" method="post">
+<form class="ui form {% if formstatus %} {{formstatus}} {% endif %} " action="/users" method="post">
 <h4 class="ui dividing header">Sign Up</h4>
     <div class="field">
         <input type="text" name="firstname" id="firstname" placeholder="Firstname" value="{{firstname}}" required>
@@ -10,37 +10,35 @@
     </div>
     <div class="field">
         <input type="text" name="username" id="username" placeholder="Username" value="{{username}}" required>
-        <div class="ui error message">
+        {% if username_formstatus %}
+        <div class="ui {{formstatus}} message">
             <div class="header">Action Forbidden</div>
             <p>Username already used.</p>
         </div>
+        {% endif %}
     </div>
     <div class="field">
         <input type="password" name="password" id="password" placeholder="Password" required>
     </div>
     <div class="field">
         <input type="password" name="confirmpassword" id="confirmpassword" placeholder="Confirm your password" required>
-        {% if message %}
-        <div class="ui warning message">
-            <div class="header">Could you check something!</div>
+        {% if password_formstatus %}
+        <div class="ui {{formstatus}} message">
             <ul class="list">
-                <li>{{message}}</li>
+                <li>{{password_message}}</li>
             </ul>
         </div>
         {% endif %}
     </div>
     <div class="field">
         <input type="email" name="mail" id="mail" placeholder="Email" value="{{mail}}" required>
-        <div class="ui warning message">
-            <div class="header">Could you check something!</div>
+        {% if email_formstatus %}
+        <div class="ui {{formstatus}} message">
             <ul class="list">
-                <li>That e-mail has been subscribed, but you have not yet clicked the verification link in your e-mail.</li>
+                <li>{{email_message}}</li>
             </ul>
         </div>
-        <div class="ui error message">
-            <div class="header">Action Forbidden</div>
-            <p>You can only sign up for an account once with a given e-mail address.</p>
-        </div>
+        {% endif %}
     </div>
     <input type="submit" class="ui submit button">
 </form>