This new route serves to find the client callback after successfully logging in from the provider page. This is done so that the callback becomes more flexible and can be changed at any time.
Adding a callback option to the Google OAuth provider used to define the OAuth callback URI. If not defined, the
callback URI will use the default value in the .env file.
provides the option to define a callback URI following a request from the frontend; if not defined, it will
automatically use the backend's default URI.
Create a flow where if the user logs in with a registered Google account, they are immediately authenticated, but if no
account is found, create a new one.
