add better messaging on registration failure

src/views/ContactsView.vue

@@ -530,7 +530,15 @@ export default class ContactsView extends Vue {
         try {
           const resp = await this.axios.post(url, payload, { headers });
           //console.log("Got resp data:", resp.data);
-          if (resp.data?.success?.handleId) {
+          if (resp.data?.success?.embeddedRecordError) {
+            this.alertTitle = "Registration Still Unknown";
+            let message = "There was some problem with the registration.";
+            if (typeof resp.data.success.embeddedRecordError == "string") {
+              message += " " + resp.data.success.embeddedRecordError;
+            }
+            this.alertMessage = message;
+            this.isAlertVisible = true;
+          } else if (resp.data?.success?.handleId) {
             contact.registered = true;
             db.contacts.update(contact.did, { registered: true });