got 'invalid_grant' in oauth2 SignedJwtAssertionCredentials

Question

I am trying to make an oauth2 access_token in a server-to-server JSON API scenario. But it failed with invalid_grant error, please help.

from oauth2client.client         


        

Answer 1

I fixed it.

SERVICE_ACCOUNT_EMAIL = 'xxxxxx.apps.googleusercontent.com'

the above is client ID not Email, I fixed this and it's working now.