fix: return if user is not present (#9768)

Fixes
https://chatwoot-p3.sentry.io/share/issue/aa6a3c0accb345e984ed80eaddc3efd5/

In the case where the user is redirected to the page from a redirect
like google login, the analytics helper breaks. This PR fixes it by
checking if the user is present.

This does not break the user email tracking since the user is redirected
anyway and the `AnalyticsHelper` is reinitialised

app/javascript/dashboard/helper/AnalyticsHelper/index.js

@@ -38,9 +38,10 @@ export class AnalyticsHelper {
    * @param {Object} user - User object
    */
   identify(user) {
-    if (!this.analytics) {
+    if (!this.analytics || !user) {
       return;
     }
+
     this.user = user;
     this.analytics.identify(this.user.email, {
       userId: this.user.id,