Both extractors and so their UIs are now able to generate URL link that alows to authorize google drive/analytics account without having access to the KBC at all. Moreover after client aproves his account, he will be asked to select sheets/profiles so the security is prevented.
In UI: find the generate external link tab as follows
for google drive extractor: click on “add sheet to extract” button
for google analytics extractor: click on “authorize” account
Generate the link and send it to the client.