Google Analytics API: "User does not have sufficient permissions for this account."

Solution 1:

Make sure you give the service account email (something like [email protected]) permissions to read/write from your GA view.

Admin > View > User Management > "Add permissions for:"

Solution 2:

Pick the right id!

In my case I was using the right credentials (account id, account secret -> authorization_code -> access_token) AND had the email permissions set up right but I was using the account id on the Admin > Account settings page and simply adding ga: to the front.

The id you actually need is the table id! (or that's the one that worked for me at least since most people here are mentioning the account id, which didn't work for me.). You can find that one here: https://ga-dev-tools.appspot.com/account-explorer/

And then you can query as

service.get_ga_data(TABLE_ID,'2017-03-25','2017-03-25','ga:users,ga:pageviews')

I found this API to be badly documented overall and the UI was unclear. But maybe that's just me.