id_token verification failed: Invalid token signature: in google cloud endpoints

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http://stackoverflow.com – I got the google cloud endpoints working with an android app and backend written in python app engine. When I uninstalled my and re-installed my app during development, I started running into a 401 error from the backend. This is without any changes in backend after I got it to work the first time. So, I cleaned up debug.keystore file in C:\Users\username\.android and also other files in the same directory.Regenerated the debug.keystore file again and got the new sha1 footprint Deleted the API project in google apps console and regenerated web client_id & android client_id with new sha1 (HowTos)