GoogleAuthenticator | PHP class to generate and verify Google Authenticator | Authentication library

I am trying to do sync from google calendar to my .NET MVC Web App.

I created a callback method that Googles Calendar API will send the new event in calendar to. But I don't get the new google calendar event instead I am getting this error:

2021-07-09 12:52:26,982 [ 37] DEBUG DotNetOpenAuth.Messaging - The following required parameters were missing from the DotNetOpenAuth.OAuth2.Messages.AccessTokenFailedResponse message: {error, }

2021-07-09 12:52:26,997 [ 37] WARN DotNetOpenAuth.Messaging
Multiple message types seemed to fit the incoming data: {AccessTokenSuccessResponse (2.0), UnauthorizedResponse (2.0), }

2021-07-09 12:52:27,013 [ 37] DEBUG DotNetOpenAuth.Messaging.Channel
Received AccessTokenSuccessResponse response.

2021-07-09 12:52:27,013 [ 37] INFO DotNetOpenAuth.Messaging.Channel
Processing incoming AccessTokenSuccessResponse (2.0) message: access_token: token_type: Bearer expires_in: 3599 scope: https://www.googleapis.com/auth/calendar

2021-07-09 12:52:27,013 [ 37] DEBUG DotNetOpenAuth.Messaging.Channel
After binding element processing, the received AccessTokenSuccessResponse (2.0) message is: access_token: token_type: Bearer expires_in: 3599 scope: https://www.googleapis.com/auth/calendar

How can I handle this ?

EDIT (adding code)

I'm trying to configure communication with Google OAuth 2.0 in my Qt project. I was using this tutorial, although it seems to be a bit outdated. I configured everything in Google APIs site, used those data in Credentials/OAuth 2.0 Client IDs page:

Header file:

I have a CakePHP application running on Cake PHP 3.8.13, CakeDC Users 8.5.1 and PHP 7.4. I am attempting to use a custom controller so that I can adjust the behaviour of the LoginTrait and PasswordChangeTrait.

I have been following the documentation in https://github.com/CakeDC/users/blob/master/Docs/Documentation/Configuration.md#using-the-users-email-to-login

However my custom UsersController is not being used.

I have added the following lines to /config/bootstrap.php

I have a CakePHP application running on Cake PHP 3.8.13 and CakeDC Users 8.5.1.

I am currently able to log on using the username field, but I would like to use the email field for authentication. I have followed the instructions on https://github.com/CakeDC/users/blob/master/Docs/Documentation/Configuration.md#using-the-users-email-to-login but the system is still trying to use the username field. If I change email to username in the src/Template/Plugin/CakeDC/Users/Users/login.ctp I can log in using the username.

How can I get it to use the email field instead?

src/Application.php

On login page I get this in dev.log:

Guard authenticator does not support the request. {"firewall_key":"main","authenticator":"App\Security\LoginFormAuthenticator"} []

Plus on the register page, after submitting I get

The CSRF token is invalid. Please try to resubmit the form.

And in dev.log:

Guard authentication failed. {"exception":"[object] (Symfony\Component\Security\Core\Exception\InvalidCsrfTokenException(code: 0):

The same code is working on my colleague's machine cannot get where can be the problem.

security.yaml