# File lib/omniauth/strategies/auth0.rb, line 83
      def request_phase
        if no_client_id?
          # Do we have a client_id for this Application?
          fail!(:missing_client_id)
        elsif no_client_secret?
          # Do we have a client_secret for this Application?
          fail!(:missing_client_secret)
        elsif no_domain?
          # Do we have a domain for this Application?
          fail!(:missing_domain)
        else
          # All checks pass, run the Oauth2 request_phase method.
          super
        end
      end