What to do when Google Calendar API sync token is invalid?
问题 In the documentation for Google Calendar API, it says this: Sometimes sync tokens are invalidated by the server, for various reasons including token expiration or changes in related ACLs. In such cases, the server will respond to an incremental request with a response code 410. This should trigger a full wipe of the client’s store and a new full sync. A lot of sync tokens in my system are being invalidated, and I don't know why. I am getting this error for a lot of calendars: (410) Sync token