How to get basic data with the new Google Ads API using JavaScript

About a year ago, Google AdWords changed their name to Google Ads and now they complicated Google Ads API. Their official library doesn't work and I don't know where I should get information from.

My questions:

1. How I can get all Google Ads scopes like here
2. How LIST function for Google Ads looks like in JavaScript? (to get basics Google Ads user data) Link

Note:

Doesn't work anymore:

• gapi.client.load('https://www.googleapis.com/discovery/v1/apis/adwords/v2/rest')
• gapi.client.load('googleads', 'v3')
• gapi.client.load('adwords', 'v2')
• gapi.client.load('https://googleads.googleapis.com/v2/customers')

One working scope for Google Ads:

• https://www.googleapis.com/auth/adwords