Step 1: Go to https://console.developers.google.com and create a new project Step 2: Go to API Library and search for Blogger Step 3: Enable Blogger API v3.
Google OAuth 2.0 Playground Step 1: Go to https://developers.google.com/oauthplayground/ and login. Step 2: Click on settings and select OAuth flow as Server-side, OAuth endpoint as Google, Access token location as Authorization header w/ Bearer prefix, and Access type as Offline.