While using Google OpenID, there is an already selected option for “remember approval”. How can the same be achieved for a login with OAuth 2.0 ?
It seems to ask permission everytime for the defined scope settings, whereas in facebook Oauth 2.0, it asks only once.
OpenID example from Stack Exchange, with “remember this approval” option

http://googleappsdeveloper.blogspot.com/2011/10/upcoming-changes-to-oauth-20-endpoint.html
see Change #3: Server-side auto-approval