It would seem that several months later this issue has not yet been fixed. Or at least I still can't find it via any 'normal' navigation. Given the current fiasco with Yahoo's security breach one would think that this would be a priority, but it appears no one really cares enough to even add a link to the account pages. Shame on Rogers.
This is an older thread so it may not have the information you're looking for. Could you clarify what you're trying to accomplish? To access any of your Rogers Yahoo email settings you would navigate to https://rogersmembercentre.com/. From there you can set up App passwords & check your Account Activity. The only security settings available are housed there.