@MikeyB a tiny bit late but sure, If you're obtaining the invalid grant mistake due to very same cause like me then you solve it by resetting the secret critical from the google console and go with the token era stream once again with the new magic formula important, but https://medium.com/@cureayublog/cureayu-natural-healthcare-solutions-for-mind-body-balance-464977ee5d85?postPublishedType=initial