Repository for my article: Google OAuth 2.0 - Testing with Curl
v1: https://www.jhanley.com/google-oauth-2-0-testing-with-curl/
v2: https://www.jhanley.com/google-oauth-2-0-testing-with-curl-version-2/
v3: https://www.jhanley.com/google-oauth-2-0-testing-with-curl-refresh-access-token/