Token-Fehler behoben

partials/navbar.html

@@ -12,7 +12,7 @@
 
         <form class="navbar-form navbar-left">
           <div class="form-group is-empty">
-            <input type="text" ng-model="credentials.username" class="form-control col-md-8" placeholder="Benutzername">
+            <input type="text" ng-change="generateToken()" ng-model="credentials.username" class="form-control col-md-8" placeholder="Benutzername">
             <input type="password" ng-change="generateToken()" ng-model="credentials.password" class="form-control col-md-8" placeholder="Passwort">
             <button class="btn btn-info btn-xs" ng-click="verifyCredentials()">Verify</button>
           </div>