Google API Service Account Authorization Error

Question

I am using the google-api-php-client client to connect to Google Drive using a Service Account. Most of the time it works, but every so often (say if I sit here an refresh

Answer 1

I've seen this error intermittently when the account that's being impersonated is newly created. By the looks of it, adding a 10 second delay before trying to create the service eliminates the problem.