# File lib/omniauth/strategies/oauth2/yammer.rb, line 46
      def build_access_token
        # Dance to get the real token out of the object returned by Yammer
        verifier = request.params['code']
        temp_access_token = client.auth_code.get_token(verifier, {:redirect_uri => callback_url}.merge(options))
        token = eval(temp_access_token.token)['token']
        @access_token = ::OAuth2::AccessToken.new(client, token, temp_access_token.params)
      end