improving path handling, working on authorization flow

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.oidc.web/src/main/resources/en/user.js

@@ -0,0 +1,12 @@
+const UNAUTHORIZED = 401;
+
+async function handleUser(response){
+    if (response.status == UNAUTHORIZED) {
+        window.location.href = 'login.html?return_to='+encodeURI(window.location.href);
+        return;
+    }
+    var user = await response.json();
+    // TODO: load navigation
+}
+
+fetch(api+"/user",{method:'POST'}).then(handleUser);