Since paid subscription adds an automatic monitor to check if logins have been compromised in data breaches, would be nice to have a manual button for free users to do that.

I think it doesnt devaluate the paid feature, since automatic monitoring is still overpowered and nice for a paid plan, but still allow free users to fast and manually (due to free plan) check if pass or email was compromised.

I also think it is not a too demanding feature since there is a system to check data, just a manual button next to login register for free users who trust Proton and dont want to add another subscription to the list when free plan is enough.