Merge pull request #6 from ravikumar-venkatesan-m/main

936538: FAQ section added.

Author: maheshtps

README.md

@@ -20,3 +20,21 @@ To run this application, we have to Turn on the Google Calendar API and DOWNLOAD
 > At the first time of running sample, it will attempt to open a new browser window, in that you have to authorize it.
 
 **Blog**: [How to Synchronize Google Calendar with Syncfusion Blazor Scheduler](https://www.syncfusion.com/blogs/post/synchronize-google-calendar-with-syncfusion-blazor-scheduler.aspx)
+
+## FAQ
+
+### Error 400: redirect_uri_mismatch
+
+**Q: I keep getting "Error 400: redirect_uri_mismatch" when trying to authenticate with Google Calendar. How can I fix this?**
+
+**A:** To resolve this error, create the OAuth Client ID as a "Desktop app" application type rather than a "Web application".
+
+**Error Screenshot:**
+
+![Error 400: redirect_uri_mismatch](wwwroot/faq/error_400_redirect_uri_mismatch.png)
+
+**Solution:**
+
+Select "Desktop app" as the application type when creating the OAuth client ID:
+
+![Select Desktop app solution](wwwroot/faq/error_400_redirect_uri_mismatch_solution.png)