Using the Erathos platform:

When selecting Google Ads as a new connector on the Erathos platform, you will need to authorize the connection by simply logging into the Google Ads account associated with your browser.

Just click on 'Authorize Google Ads' as shown in the attachment below:

Don't forget to click on Save and close to advance to the next steps of the integration.

With this connection created you can seemlessly move your Google Ads data to your BigQuery, Redshift or Postgres data-warehouse.