Mints a fresh AgeGo ag_token from this origin and opens the target test environment with
ag_token=<jwt> appended.
Prereq: You may have to complete a real AgeGo verification at least once on a third-party AgeGo-integrated site
in this browser profile so the persistent *.agego.com cookies are present. Without them, the
token-mint API call from the SDK may fail.
Note: This tool is known to work best on Google Chrome browser, and not so well on Safari