Hello Gurcharan, Since you're authenticating using a username and password, it seems like you may be using ClientLogin <https://developers.google.com/api-client-library/java/google-api-java-client/client-login> which has been deprecated <https://developers.google.com/identity/protocols/AuthForInstalledApps>. Please review this doc <https://cloud.google.com/appengine/docs/deprecations/clientlogin> for information regarding migrating from ClientLogin to OAuth 2.0.
Until your application migrated to OAuth 2.0, you can try allowing less secure apps <http://www.google.com/settings/security/lesssecureapps> (turn 'On') although it's not guaranteed to work. I hope it helps. Cheers! -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/f0e409ac-0f7d-4464-b72f-3e227865aac4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
