Refresh `access_token`

Eventually, access_token will expire and accessing an API method will return 401 unauthorized. Your application needs to refresh the OAuth2 token with the stored refresh_token returned when initially creating an access token.

Once refreshed, calls on behalf of the originally authorized user can resume immediately. Use the newly returned access_token for all future API requests.


Invalid Grant?

If you receive an invalid grant response it is likely because your refresh_token is invalid.