How to revoke the authorization to view my Google account for an app? [migrated]

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http://superuser.com – I recently installed Feedly on my phone. It asked me the authorization to access my Google account. Now I want to revoke this authorization, but I don't know how to do this. I searched on my Google account (via web) under the Security part, but Feedly is not listed there. I have an Android 4.3 stock ROM and, if important, my Google account is not a Google+ account. (HowTos)