correct authentication

web/templates/dashboard.html.tera

@@ -334,6 +334,18 @@
                 </div>
             </div>
         </section>
+        <section id="user-error" class="is-hidden hero is-fullheight">
+            <div class="hero-body">
+                <div class="container has-text-centered">
+                    <p class="title">
+                        You do not have permissions for this server
+                    </p>
+                    <p class="subtitle">
+                        Ask an admin to grant you the "Manage Messages" permission.
+                    </p>
+                </div>
+            </div>
+        </section>
     </div>
     <!-- /main content -->
 </div>