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

I have solved this problem with the Fabio's first suggestion.

OmniAuth.config.on_failure = Proc.new do |env|
  UsersController.action(:omniauth_failure).call(env)
  #this will invoke the omniauth_failure action in UsersController.
end

In my UsersController

class UsersController < ActionController::Base
  def omniauth_failure
    redirect_to init_sign_in_users_path
    #redirect wherever you want.
  end
end