Google account token expiration(for Google Calendar)

→ Google APIs use the OAuth 2.0 protocol for authentication and authorization. Google supports common OAuth 2.0 scenarios such as those for a web server, installed, and client-side applications.

→ All applications follow a basic pattern when accessing a Google API using OAuth 2.0. At a high level, you follow four steps:

  • Obtain OAuth 2.0 credentials from the Google API Console.
  • Obtain an access token from the Google Authorization Server.
  • Send the access token to an API.
  • Refresh the access token, if necessary.

More info will be read from here.