Help needed with callback url

[arshPratap]

Hi everyone I was trying to set up a small oauth application and was trying to sync in with the details described here. To set up my project I have :

• set up a google client id
• set up and properly installed the web_auth flutter package

Unfortunately, I have not been able to configure my callback url scheme and need some help regarding the same.As of now, google auth opens up successfully but gives our the following error 404 : invalid request.
you can test the project

Thanks again in advance

[Rachit201]

Even I am looking forward for the solution of the same issue.