Comment 2 for bug 923573

Hm, just realized this is probably on the keystone project instead. An admin_token is the token the middleware uses to authenticate to the identity service so that it can validate a user token.

I also was having some discussions around this, and giving the admin user and password is actually a lot more powerful than just giving it a token - I'm not sure what people's security policies will allow, but maybe a better approach is to use an admin token that doesn't expire automatically instead of having it auto-renew the token.