# File lib/omniauth/strategies/google_oauth2.rb, line 92
      def custom_build_access_token
        access_token =
        if request.xhr? && request.params['code']
          verifier = request.params['code']
          client.auth_code.get_token(verifier, get_token_options('postmessage'), deep_symbolize(options.auth_token_params || {}))
        elsif request.params['code'] && request.params['redirect_uri']
          verifier = request.params['code']
          redirect_uri = request.params['redirect_uri']
          client.auth_code.get_token(verifier, get_token_options(redirect_uri), deep_symbolize(options.auth_token_params || {}))
        elsif verify_token(request.params['access_token'])
          ::OAuth2::AccessToken.from_hash(client, request.params.dup)
        else
          verifier = request.params["code"]
          client.auth_code.get_token(verifier, get_token_options(callback_url), deep_symbolize(options.auth_token_params))
        end

        verify_hd(access_token)
        access_token
      end