Invalid credentials: Google API calendar
问题 I am new to using Google APIs. I followed steps to setup Google Calendar sample code in eclipse using Google client library. I deployed the code to app engine using the cmd command- mvn appengine:update (when tried to deploy through eclipse it gave me an error saying the project is not an App Engine project). Deploying through command line worked and I could launch my web application. Suddenly, after few API request calls, started getting invalid credentials error: error:401 domain:global