How to rescue OmniAuth::Strategies::OAuth2::CallbackError?

Question

I am building a Rails application with Omniauth for log in service.To authenticate Google I am using OmniAuth Google OAuth2 Strategy.

When user clicks \'allow access\' b

Answer 1

You can set the on_failure proc in the omniauth initializer in an even cleaner fashion:

OmniAuth.config.on_failure = UsersController.action(:oauth_failure)