docs: function getTokenDefault(code, token, oauth2Client) {
      return new Promise((resolve, reject) => {
          const requestData = {
              code,
              token,
          };
          request({
              url: 'https://us-central1-gas-include.cloudfunctions.net/getToken',
              method: "POST",
              json: true,
              headers: {
                  "content-type": "application/json",
              },
              body: requestData,
          }, (error, response, body) => {
              const token = body;
              if (error) {
                  reject(error);
              } else if (response.statusCode === 200) {
                  resolve(token);
              } else {
                  reject({
                      message: 'Failed to get a token for the default Oauth client.',
                      print: true,
                  });
              }
          });
      });
  }