fixed AUTHENTICATE button no response

src/main/java/com/google/webauthn/gaedemo/servlets/RegisteredKeys.java

@@ -35,6 +35,7 @@ import com.google.webauthn.gaedemo.objects.AuthenticatorAttestationResponse;
 import com.google.webauthn.gaedemo.objects.CredentialPublicKey;
 import com.google.webauthn.gaedemo.service.UserProxyService;
 import com.google.webauthn.gaedemo.storage.Credential;
+import org.apache.http.HttpStatus;
 
 /**
  * Servlet implementation class RegisteredKeys
@@ -58,7 +59,13 @@ public class RegisteredKeys extends HttpServlet {
     /* Tyler start -----------------*/
     UserProxyService userProxyService = UserProxyService.getInstance();
     User user = userProxyService.getCurrentUser();
-    String currentUser = (user != null) ? user.getEmail() : userService.getCurrentUser().getEmail();
+    if(user == null){
+      response.setContentType("application/json");
+      response.getWriter().println("no username input");
+      response.setStatus(HttpStatus.SC_INTERNAL_SERVER_ERROR);
+      return;
+    }
+    String currentUser = user.getEmail();
     log.info("Get " + currentUser);
     /* Tyler end -----------------*/
     /* Original code

src/main/java/com/google/webauthn/gaedemo/servlets/RemoveCredential.java

@@ -70,7 +70,14 @@ public class RemoveCredential extends HttpServlet {
   @Override
   protected void doPost(HttpServletRequest request, HttpServletResponse response)
       throws ServletException, IOException {
+    /* Tyler start -----------------*/
+    UserProxyService userProxyService = UserProxyService.getInstance();
+    User user = userProxyService.getCurrentUser();
+    String currentUser = user.getEmail();
+    /* Tyler end -----------------*/
+    /* Original code
     String currentUser = userService.getCurrentUser().getEmail();
+     */
     Credential.remove(currentUser, request.getParameter("credentialId"));
 
     response.setContentType("application/json");

src/main/webapp/js/webauthn.js

@@ -598,7 +598,9 @@ document.addEventListener('DOMContentLoaded', () => {
 
 window.addEventListener('load', () => {
   onClick('#credential-button', registerNewCredential);
-  onClick('#platform-button', registerPlatformAuthenticator);
+  // Tyler disable annotation
+  // onClick('#platform-button', registerPlatformAuthenticator);
   onClick('#authenticate-button', getAssertion);
-  onClick('#isuvpaa-button', isUVPAA);
+  // Tyler disable annotation
+  // onClick('#isuvpaa-button', isUVPAA);
 });