fixed creation of first user upon database initalization

frontend/src/App.svelte

@@ -40,9 +40,7 @@
             <Route path="/user/:user_id/edit"          component={UserEdit} />
             <Route path="/user/oidc/add"               component={EditService} />
             <Route path="/user/oidc/edit/:serviceName" component={EditService} />
-            <Route>
-                <p>Page not found</p>
-            </Route>
+            <Route component={User} />
     {:else}
         <Login />
         <Route path="/oidc_callback" component={Callback} />