addWorksheet method fails: this.isAuthActive is not a function

Running the following code on Node.js v10.16.0:

const Gss = require('google-spreadsheet');
const { promisify } = require('util');
const creds = require('./client_secret.json');

const main = async () => {
  const sheetId = '<sheet id>';
  const doc = new Gss(sheetId);
  await promisify(doc.useServiceAccountAuth)(creds);

  const sheet = await promisify(doc.addWorksheet)({
    title: 'test',
  });
};

main();

fails with

(node:13279) UnhandledPromiseRejectionWarning: TypeError: this.isAuthActive is not a function
    at GoogleSpreadsheet.addWorksheet (/home/niklash/standup-query-bot/bot/node_modules/google-spreadsheet/index.js:225:15)

google-spreadsheet version is: 2.0.7

[baruchiro]

I think: Before:

promisify(doc.addWorksheet)(options)

After:

promisify(doc.addWorksheet).call(doc, options)

[xhalo32]

@amrshakya The issue was that the promisified method did not have this bound which the function requires, i.e. I was trying to use the method like a static class method. Thus when I bound the doc as this using .call it worked like an ordinary non-static method call. I suppose doc.useServiceAccountAuth does not use this and that’s why it worked without the bound context. Classic javascript