Api says to give credential like merchant id in json file

[way2enjoy2]

We were tryjng to use this api. We got merchant id after oauth2 approval from customers but how can we use this api if we have to use json file. I want to manage our customers Google shopping feed so i want to pass merchant id and access token from database but this library seems to be asking us to input merchant id in json file. With that approach i can only manage one client . I am very sure i dont know something basic otherwise Google will never design something which is for ond customers. So my apologies. I learn from you guys

Any help on how can we use this library for thousands oc customers by passing data straight from database will be great

[pbassut]

The node client library accepts a parameter called keyFile. So you would use like this:

  const auth = new google.auth.GoogleAuth({
    keyFile: './service-account.json',
    // Scopes can be specified either as an array or as a single, space-delimited string.
    scopes: ['https://www.googleapis.com/auth/content']
  });
  const authClient = await auth.getClient();
  const content = google.content({
    version: 'v2.1',
    auth: authClient
  });